85190505856 has 32 divisors (see below), whose sum is σ = 173854873080. Its totient is φ = 41556341760.

The previous prime is 85190505839. The next prime is 85190505857. The reversal of 85190505856 is 65850509158.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85190505857) 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, 8111226 + ... + 8121721.

Almost surely, 2^85190505856 is an apocalyptic number.

It is an amenable number.

85190505856 is an abundant number, since it is smaller than the sum of its proper divisors (88664367224).

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

85190505856 is a wasteful number, since it uses less digits than its factorization.

85190505856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16233002 (or 16232990 counting only the distinct ones).

The product of its (nonzero) digits is 2160000, while the sum is 52.

The spelling of 85190505856 in words is "eighty-five billion, one hundred ninety million, five hundred five thousand, eight hundred fifty-six".