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68638870382 = 2190011806191
BaseRepresentation
bin111111111011001100…
…100000101101101110
320120011120010220001112
4333323030200231232
52111033022323012
651310545112022
74646635525505
oct777314405556
9216146126045
1068638870382
1127122942265
1211377028612
13661b458504
143471d4183c
151bbad98122
hexffb320b6e

68638870382 has 8 divisors (see below), whose sum is σ = 102963781152. Its totient is φ = 34317610000.

The previous prime is 68638870381. The next prime is 68638870439. The reversal of 68638870382 is 28307883686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×686388703822 (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68638870381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865094 + ... + 941097.

It is an arithmetic number, because the mean of its divisors is an integer number (12870472644).

Almost surely, 268638870382 is an apocalyptic number.

68638870382 is a deficient number, since it is larger than the sum of its proper divisors (34324910770).

68638870382 is a wasteful number, since it uses less digits than its factorization.

68638870382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1825194.

The product of its (nonzero) digits is 18579456, while the sum is 59.

The spelling of 68638870382 in words is "sixty-eight billion, six hundred thirty-eight million, eight hundred seventy thousand, three hundred eighty-two".

Divisors: 1 2 19001 38002 1806191 3612382 34319435191 68638870382