961807816 has 32 divisors (see below), whose sum is σ = 1900044000. Its totient is φ = 455175936.

The previous prime is 961807783. The next prime is 961807843. The reversal of 961807816 is 618708169.

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, 219600 + ... + 223936.

It is an arithmetic number, because the mean of its divisors is an integer number (59376375).

Almost surely, 2^961807816 is an apocalyptic number.

It is an amenable number.

961807816 is a deficient number, since it is larger than the sum of its proper divisors (938236184).

961807816 is a wasteful number, since it uses less digits than its factorization.

961807816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821 (or 5817 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 961807816 is about 31013.0265533695. The cubic root of 961807816 is about 987.1036716677.

The spelling of 961807816 in words is "nine hundred sixty-one million, eight hundred seven thousand, eight hundred sixteen".