90647777860 has 12 divisors (see below), whose sum is σ = 190360333548. Its totient is φ = 36259111136.

The previous prime is 90647777833. The next prime is 90647777879. The reversal of 90647777860 is 6877774609.

It can be written as a sum of positive squares in 2 ways, for example, as 41161105924 + 49486671936 = 202882^2 + 222456^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2266194427 + ... + 2266194466.

It is an arithmetic number, because the mean of its divisors is an integer number (15863361129).

Almost surely, 2^90647777860 is an apocalyptic number.

It is an amenable number.

90647777860 is an abundant number, since it is smaller than the sum of its proper divisors (99712555688).

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

90647777860 is a wasteful number, since it uses less digits than its factorization.

90647777860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4532388902 (or 4532388900 counting only the distinct ones).

The product of its (nonzero) digits is 24893568, while the sum is 61.

The spelling of 90647777860 in words is "ninety billion, six hundred forty-seven million, seven hundred seventy-seven thousand, eight hundred sixty".