961909576772 has 12 divisors (see below), whose sum is σ = 1693072059756. Its totient is φ = 478174702560.

The previous prime is 961909576769. The next prime is 961909576781. The reversal of 961909576772 is 277675909169.

It can be written as a sum of positive squares in 2 ways, for example, as 697184920576 + 264724656196 = 834976^2 + 514514^2 .

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, 695020679 + ... + 695022062.

It is an arithmetic number, because the mean of its divisors is an integer number (141089338313).

Almost surely, 2^961909576772 is an apocalyptic number.

It is an amenable number.

961909576772 is a deficient number, since it is larger than the sum of its proper divisors (731162482984).

961909576772 is a wasteful number, since it uses less digits than its factorization.

961909576772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390042918 (or 1390042916 counting only the distinct ones).

The product of its (nonzero) digits is 90016920, while the sum is 68.

The spelling of 961909576772 in words is "nine hundred sixty-one billion, nine hundred nine million, five hundred seventy-six thousand, seven hundred seventy-two".