961056640 has 64 divisors (see below), whose sum is σ = 2306860560. Its totient is φ = 382861312.

The previous prime is 961056619. The next prime is 961056659. The reversal of 961056640 is 46650169.

It is a tau number, because it is divible by the number of its divisors (64).

It is a self number, because there is not a number n which added to its sum of digits gives 961056640.

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, 161559 + ... + 167401.

Almost surely, 2^961056640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 961056640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153430280).

961056640 is an abundant number, since it is smaller than the sum of its proper divisors (1345803920).

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

961056640 is a wasteful number, since it uses less digits than its factorization.

961056640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6119 (or 6107 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 961056640 is about 31000.9135349267. The cubic root of 961056640 is about 986.8466273482.

The spelling of 961056640 in words is "nine hundred sixty-one million, fifty-six thousand, six hundred forty".