961991718 has 16 divisors (see below), whose sum is σ = 1924403520. Its totient is φ = 320593896.

The previous prime is 961991707. The next prime is 961991753. The reversal of 961991718 is 817199169.

961991718 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

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, 17721 + ... + 47307.

It is an arithmetic number, because the mean of its divisors is an integer number (120275220).

Almost surely, 2^961991718 is an apocalyptic number.

961991718 is an abundant number, since it is smaller than the sum of its proper divisors (962411802).

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

961991718 is a wasteful number, since it uses less digits than its factorization.

961991718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35011.

The product of its digits is 244944, while the sum is 51.

The square root of 961991718 is about 31015.9913270558. The cubic root of 961991718 is about 987.1665805524.

The spelling of 961991718 in words is "nine hundred sixty-one million, nine hundred ninety-one thousand, seven hundred eighteen".