85459639992 has 16 divisors (see below), whose sum is σ = 213649100040. Its totient is φ = 28486546656.

The previous prime is 85459639873. The next prime is 85459639997. The reversal of 85459639992 is 29993695458.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85459639997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1780409143 + ... + 1780409190.

Almost surely, 2^85459639992 is an apocalyptic number.

It is an amenable number.

85459639992 is an abundant number, since it is smaller than the sum of its proper divisors (128189460048).

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

85459639992 is a wasteful number, since it uses less digits than its factorization.

85459639992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3560818342 (or 3560818338 counting only the distinct ones).

The product of its digits is 188956800, while the sum is 69.

The spelling of 85459639992 in words is "eighty-five billion, four hundred fifty-nine million, six hundred thirty-nine thousand, nine hundred ninety-two".