722125656 has 96 divisors (see below), whose sum is σ = 2307302400. Its totient is φ = 199661760.

The previous prime is 722125637. The next prime is 722125673. The reversal of 722125656 is 656521227.

722125656 is a `hidden beast` number, since 72 + 21 + 2 + 565 + 6 = 666.

It is a super-3 number, since 3×722125656³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 722125656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7486 + ... + 38733.

It is an arithmetic number, because the mean of its divisors is an integer number (24034400).

Almost surely, 2^722125656 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 722125656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153651200).

722125656 is an abundant number, since it is smaller than the sum of its proper divisors (1585176744).

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

722125656 is a wasteful number, since it uses less digits than its factorization.

722125656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46269 (or 46262 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 722125656 is about 26872.3957994072. The cubic root of 722125656 is about 897.1621128087.

The spelling of 722125656 in words is "seven hundred twenty-two million, one hundred twenty-five thousand, six hundred fifty-six".