9777145920 has 56 divisors (see below), whose sum is σ = 31042441344. Its totient is φ = 2607238656.

The previous prime is 9777145909. The next prime is 9777146053. The reversal of 9777145920 is 295417779.

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, 5091304 + ... + 5093223.

Almost surely, 2^9777145920 is an apocalyptic number.

It is an amenable number.

9777145920 is an abundant number, since it is smaller than the sum of its proper divisors (21265295424).

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

9777145920 is a wasteful number, since it uses less digits than its factorization.

9777145920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10184547 (or 10184537 counting only the distinct ones).

The product of its (nonzero) digits is 1111320, while the sum is 51.

The square root of 9777145920 is about 98879.4514547891. The cubic root of 9777145920 is about 2138.3101575160.

The spelling of 9777145920 in words is "nine billion, seven hundred seventy-seven million, one hundred forty-five thousand, nine hundred twenty".