85639702744 has 32 divisors (see below), whose sum is σ = 172214910000. Its totient is φ = 39800771712.

The previous prime is 85639702721. The next prime is 85639702769. The reversal of 85639702744 is 44720793658.

It is a super-2 number, since 2×85639702744² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5307219 + ... + 5323330.

Almost surely, 2^85639702744 is an apocalyptic number.

It is an amenable number.

85639702744 is an abundant number, since it is smaller than the sum of its proper divisors (86575207256).

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

85639702744 is a wasteful number, since it uses less digits than its factorization.

85639702744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10630627 (or 10630623 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 55.

The spelling of 85639702744 in words is "eighty-five billion, six hundred thirty-nine million, seven hundred two thousand, seven hundred forty-four".