961863644 has 12 divisors (see below), whose sum is σ = 1923727344. Its totient is φ = 412227264.

The previous prime is 961863563. The next prime is 961863659. The reversal of 961863644 is 446368169.

961863644 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17176109 + ... + 17176164.

It is an arithmetic number, because the mean of its divisors is an integer number (160310612).

Almost surely, 2^961863644 is an apocalyptic number.

It is an amenable number.

961863644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

961863644 is a wasteful number, since it uses less digits than its factorization.

961863644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34352284 (or 34352282 counting only the distinct ones).

The product of its digits is 746496, while the sum is 47.

The square root of 961863644 is about 31013.9266137005. The cubic root of 961863644 is about 987.1227700630.

The spelling of 961863644 in words is "nine hundred sixty-one million, eight hundred sixty-three thousand, six hundred forty-four".