961765720 has 32 divisors (see below), whose sum is σ = 2165926320. Its totient is φ = 384359040.

The previous prime is 961765699. The next prime is 961765757. The reversal of 961765720 is 27567169.

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, 36574 + ... + 57106.

Almost surely, 2^961765720 is an apocalyptic number.

It is an amenable number.

961765720 is an abundant number, since it is smaller than the sum of its proper divisors (1204160600).

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

961765720 is a wasteful number, since it uses less digits than its factorization.

961765720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21715 (or 21711 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 961765720 is about 31012.3478633914. The cubic root of 961765720 is about 987.0892704115.

The spelling of 961765720 in words is "nine hundred sixty-one million, seven hundred sixty-five thousand, seven hundred twenty".