72563706556 has 48 divisors (see below), whose sum is σ = 140801649408. Its totient is φ = 32444921600.

The previous prime is 72563706517. The next prime is 72563706563. The reversal of 72563706556 is 65560736527.

It is a super-2 number, since 2×72563706556² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1357716 + ... + 1410148.

It is an arithmetic number, because the mean of its divisors is an integer number (2933367696).

Almost surely, 2^72563706556 is an apocalyptic number.

It is an amenable number.

72563706556 is a deficient number, since it is larger than the sum of its proper divisors (68237942852).

72563706556 is a wasteful number, since it uses less digits than its factorization.

72563706556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52962 (or 52960 counting only the distinct ones).

The product of its (nonzero) digits is 7938000, while the sum is 52.

The spelling of 72563706556 in words is "seventy-two billion, five hundred sixty-three million, seven hundred six thousand, five hundred fifty-six".