85811257673638 has 16 divisors (see below), whose sum is σ = 147115767559680. Its totient is φ = 36773564687496.

The previous prime is 85811257673633. The next prime is 85811257673651. The reversal of 85811257673638 is 83637675211858.

85811257673638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85811257673633) 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, 223851756 + ... + 224234767.

It is an arithmetic number, because the mean of its divisors is an integer number (9194735472480).

Almost surely, 2^{85811257673638} is an apocalyptic number.

85811257673638 is a deficient number, since it is larger than the sum of its proper divisors (61304509886042).

85811257673638 is a wasteful number, since it uses less digits than its factorization.

85811257673638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448100211.

The product of its digits is 406425600, while the sum is 70.

The spelling of 85811257673638 in words is "eighty-five trillion, eight hundred eleven billion, two hundred fifty-seven million, six hundred seventy-three thousand, six hundred thirty-eight".