85900656731 has 2 divisors, whose sum is σ = 85900656732. Its totient is φ = 85900656730.

The previous prime is 85900656689. The next prime is 85900656767. The reversal of 85900656731 is 13765600958.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85900656731 is a prime.

It is a super-2 number, since 2×85900656731² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85900656731.

It is not a weakly prime, because it can be changed into another prime (85900656031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42950328365 + 42950328366.

It is an arithmetic number, because the mean of its divisors is an integer number (42950328366).

Almost surely, 2^85900656731 is an apocalyptic number.

85900656731 is a deficient number, since it is larger than the sum of its proper divisors (1).

85900656731 is an equidigital number, since it uses as much as digits as its factorization.

85900656731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 85900656731 in words is "eighty-five billion, nine hundred million, six hundred fifty-six thousand, seven hundred thirty-one".