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68201577882 = 2331262992183
BaseRepresentation
bin111111100001001000…
…010111110110011010
320112001002022010112000
4333201020113312122
52104134100443012
651155324301430
74633045563324
oct774110276632
9215032263460
1068201577882
1126a190159a9
12112746a1876
13657b98a859
14342dc30614
151b927b9ddc
hexfe1217d9a

68201577882 has 16 divisors (see below), whose sum is σ = 151559062080. Its totient is φ = 22733859276.

The previous prime is 68201577881. The next prime is 68201577953. The reversal of 68201577882 is 28877510286.

68201577882 is a `hidden beast` number, since 68 + 2 + 0 + 1 + 577 + 8 + 8 + 2 = 666.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 1262992183 = 68201577882 / (6 + 8 + 2 + 0 + 1 + 5 + 7 + 7 + 8 + 8 + 2).

It is not an unprimeable number, because it can be changed into a prime (68201577881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631496038 + ... + 631496145.

It is an arithmetic number, because the mean of its divisors is an integer number (9472441380).

Almost surely, 268201577882 is an apocalyptic number.

68201577882 is an abundant number, since it is smaller than the sum of its proper divisors (83357484198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68201577882 is a wasteful number, since it uses less digits than its factorization.

68201577882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1262992194 (or 1262992188 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 54.

The spelling of 68201577882 in words is "sixty-eight billion, two hundred one million, five hundred seventy-seven thousand, eight hundred eighty-two".

Divisors: 1 2 3 6 9 18 27 54 1262992183 2525984366 3788976549 7577953098 11366929647 22733859294 34100788941 68201577882