85112731880 has 64 divisors (see below), whose sum is σ = 217996272000. Its totient is φ = 29604424960.

The previous prime is 85112731829. The next prime is 85112731897. The reversal of 85112731880 is 8813721158.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4195055 + ... + 4215294.

It is an arithmetic number, because the mean of its divisors is an integer number (3406191750).

Almost surely, 2^85112731880 is an apocalyptic number.

It is an amenable number.

85112731880 is an abundant number, since it is smaller than the sum of its proper divisors (132883540120).

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

85112731880 is a wasteful number, since it uses less digits than its factorization.

85112731880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8410394 (or 8410390 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 44.

The spelling of 85112731880 in words is "eighty-five billion, one hundred twelve million, seven hundred thirty-one thousand, eight hundred eighty".