85807885288644 has 72 divisors (see below), whose sum is σ = 228325624042880. Its totient is φ = 27096467716800.

The previous prime is 85807885288637. The next prime is 85807885288661. The reversal of 85807885288644 is 44688258870858.

85807885288644 is a `hidden beast` number, since 8 + 5 + 8 + 0 + 7 + 8 + 8 + 528 + 86 + 4 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22926309 + ... + 26405139.

Almost surely, 2^{85807885288644} is an apocalyptic number.

It is an amenable number.

85807885288644 is an abundant number, since it is smaller than the sum of its proper divisors (142517738754236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85807885288644 is a wasteful number, since it uses less digits than its factorization.

85807885288644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3514921 (or 3514916 counting only the distinct ones).

The product of its (nonzero) digits is 8808038400, while the sum is 81.

The spelling of 85807885288644 in words is "eighty-five trillion, eight hundred seven billion, eight hundred eighty-five million, two hundred eighty-eight thousand, six hundred forty-four".