961589209420 has 72 divisors (see below), whose sum is σ = 2360829693600. Its totient is φ = 328030940160.

The previous prime is 961589209403. The next prime is 961589209433. The reversal of 961589209420 is 24902985169.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2270341 + ... + 2660380.

It is an arithmetic number, because the mean of its divisors is an integer number (32789301300).

Almost surely, 2^961589209420 is an apocalyptic number.

It is an amenable number.

961589209420 is an abundant number, since it is smaller than the sum of its proper divisors (1399240484180).

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

961589209420 is a wasteful number, since it uses less digits than its factorization.

961589209420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4930943 (or 4930934 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 55.

The spelling of 961589209420 in words is "nine hundred sixty-one billion, five hundred eighty-nine million, two hundred nine thousand, four hundred twenty".