85621578704 has 20 divisors (see below), whose sum is σ = 166049984100. Its totient is φ = 42769969920.

The previous prime is 85621578607. The next prime is 85621578733. The reversal of 85621578704 is 40787512658.

It can be written as a sum of positive squares in 2 ways, for example, as 37900302400 + 47721276304 = 194680^2 + 218452^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2533907 + ... + 2567474.

It is an arithmetic number, because the mean of its divisors is an integer number (8302499205).

Almost surely, 2^85621578704 is an apocalyptic number.

It is an amenable number.

85621578704 is a deficient number, since it is larger than the sum of its proper divisors (80428405396).

85621578704 is a wasteful number, since it uses less digits than its factorization.

85621578704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102438 (or 5102432 counting only the distinct ones).

The product of its (nonzero) digits is 3763200, while the sum is 53.

The spelling of 85621578704 in words is "eighty-five billion, six hundred twenty-one million, five hundred seventy-eight thousand, seven hundred four".