85807878740 has 24 divisors (see below), whose sum is σ = 183596482440. Its totient is φ = 33675544448.

The previous prime is 85807878713. The next prime is 85807878781. The reversal of 85807878740 is 4787870858.

It can be written as a sum of positive squares in 4 ways, for example, as 44705182096 + 41102696644 = 211436^2 + 202738^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40474355 + ... + 40476474.

It is an arithmetic number, because the mean of its divisors is an integer number (7649853435).

Almost surely, 2^85807878740 is an apocalyptic number.

It is an amenable number.

85807878740 is an abundant number, since it is smaller than the sum of its proper divisors (97788603700).

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

85807878740 is a wasteful number, since it uses less digits than its factorization.

85807878740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80950891 (or 80950889 counting only the distinct ones).

The product of its (nonzero) digits is 28098560, while the sum is 62.

The spelling of 85807878740 in words is "eighty-five billion, eight hundred seven million, eight hundred seventy-eight thousand, seven hundred forty".