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68200043771 = 361611886011
BaseRepresentation
bin111111100001000010…
…100001010011111011
320112000222102012010002
4333201002201103323
52104133202400041
651155231343215
74633026543566
oct774102412373
9215028365102
1068200043771
1126a18168342
1211274081b0b
13657b5714b2
14342d9514dd
151b925b559b
hexfe10a14fb

68200043771 has 4 divisors (see below), whose sum is σ = 68201965944. Its totient is φ = 68198121600.

The previous prime is 68200043759. The next prime is 68200043773. The reversal of 68200043771 is 17734000286.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68200043771 - 214 = 68200027387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68200043773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 906845 + ... + 979166.

It is an arithmetic number, because the mean of its divisors is an integer number (17050491486).

Almost surely, 268200043771 is an apocalyptic number.

68200043771 is a deficient number, since it is larger than the sum of its proper divisors (1922173).

68200043771 is a wasteful number, since it uses less digits than its factorization.

68200043771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922172.

The product of its (nonzero) digits is 56448, while the sum is 38.

The spelling of 68200043771 in words is "sixty-eight billion, two hundred million, forty-three thousand, seven hundred seventy-one".

Divisors: 1 36161 1886011 68200043771