961222656 has 96 divisors (see below), whose sum is σ = 2589678000. Its totient is φ = 317030400.

The previous prime is 961222649. The next prime is 961222699. The reversal of 961222656 is 656222169.

It is a tau number, because it is divible by the number of its divisors (96).

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, 619770 + ... + 621318.

Almost surely, 2^961222656 is an apocalyptic number.

961222656 is a gapful number since it is divisible by the number (96) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 961222656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1294839000).

961222656 is an abundant number, since it is smaller than the sum of its proper divisors (1628455344).

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

961222656 is a wasteful number, since it uses less digits than its factorization.

961222656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675 (or 1655 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 961222656 is about 31003.5910178160. The cubic root of 961222656 is about 986.9034477582.

The spelling of 961222656 in words is "nine hundred sixty-one million, two hundred twenty-two thousand, six hundred fifty-six".