724758120656 has 20 divisors (see below), whose sum is σ = 1408196826852. Its totient is φ = 361352487936.

The previous prime is 724758120601. The next prime is 724758120673. The reversal of 724758120656 is 656021857427.

724758120656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 559629671056 + 165128449600 = 748084^2 + 406360^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 724758120598 and 724758120607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64154951 + ... + 64166246.

Almost surely, 2^724758120656 is an apocalyptic number.

It is an amenable number.

724758120656 is a deficient number, since it is larger than the sum of its proper divisors (683438706196).

724758120656 is a wasteful number, since it uses less digits than its factorization.

724758120656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128321558 (or 128321552 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 724758120656 in words is "seven hundred twenty-four billion, seven hundred fifty-eight million, one hundred twenty thousand, six hundred fifty-six".