85412157720 has 128 divisors (see below), whose sum is σ = 257833635840. Its totient is φ = 22634864640.

The previous prime is 85412157689. The next prime is 85412157757. The reversal of 85412157720 is 2775121458.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40459465 + ... + 40461575.

It is an arithmetic number, because the mean of its divisors is an integer number (2014325280).

Almost surely, 2^85412157720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85412157720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128916817920).

85412157720 is an abundant number, since it is smaller than the sum of its proper divisors (172421478120).

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

85412157720 is a wasteful number, since it uses less digits than its factorization.

85412157720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4065 (or 4061 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 42.

The spelling of 85412157720 in words is "eighty-five billion, four hundred twelve million, one hundred fifty-seven thousand, seven hundred twenty".