85712368631 has 2 divisors, whose sum is σ = 85712368632. Its totient is φ = 85712368630.

The previous prime is 85712368601. The next prime is 85712368691. The reversal of 85712368631 is 13686321758.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85712368631 is a prime.

It is a super-2 number, since 2×85712368631² (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 85712368631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85712368601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42856184315 + 42856184316.

It is an arithmetic number, because the mean of its divisors is an integer number (42856184316).

Almost surely, 2^85712368631 is an apocalyptic number.

85712368631 is a deficient number, since it is larger than the sum of its proper divisors (1).

85712368631 is an equidigital number, since it uses as much as digits as its factorization.

85712368631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 50.

The spelling of 85712368631 in words is "eighty-five billion, seven hundred twelve million, three hundred sixty-eight thousand, six hundred thirty-one".