85172200512 has 56 divisors (see below), whose sum is σ = 257544515136. Its totient is φ = 24334914048.

The previous prime is 85172200511. The next prime is 85172200517. The reversal of 85172200512 is 21500227158.

It is a tau number, because it is divible by the number of its divisors (56).

It is not an unprimeable number, because it can be changed into a prime (85172200511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31684743 + ... + 31687430.

Almost surely, 2^85172200512 is an apocalyptic number.

It is an amenable number.

85172200512 is an abundant number, since it is smaller than the sum of its proper divisors (172372314624).

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

85172200512 is a wasteful number, since it uses less digits than its factorization.

85172200512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63372195 (or 63372185 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 33.

The spelling of 85172200512 in words is "eighty-five billion, one hundred seventy-two million, two hundred thousand, five hundred twelve".