961957667620 has 12 divisors (see below), whose sum is σ = 2020111102044. Its totient is φ = 384783067040.

The previous prime is 961957667609. The next prime is 961957667641. The reversal of 961957667620 is 26766759169.

It can be written as a sum of positive squares in 2 ways, for example, as 129202864704 + 832754802916 = 359448^2 + 912554^2 .

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, 24048941671 + ... + 24048941710.

It is an arithmetic number, because the mean of its divisors is an integer number (168342591837).

Almost surely, 2^961957667620 is an apocalyptic number.

It is an amenable number.

961957667620 is an abundant number, since it is smaller than the sum of its proper divisors (1058153434424).

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

961957667620 is a wasteful number, since it uses less digits than its factorization.

961957667620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48097883390 (or 48097883388 counting only the distinct ones).

The product of its (nonzero) digits is 51438240, while the sum is 64.

The spelling of 961957667620 in words is "nine hundred sixty-one billion, nine hundred fifty-seven million, six hundred sixty-seven thousand, six hundred twenty".