72354949557 has 32 divisors (see below), whose sum is σ = 106143657984. Its totient is φ = 43477790400.

The previous prime is 72354949439. The next prime is 72354949567. The reversal of 72354949557 is 75594945327.

It is not a de Polignac number, because 72354949557 - 2¹² = 72354945461 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72354949557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72354949567) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2171332 + ... + 2204402.

It is an arithmetic number, because the mean of its divisors is an integer number (3316989312).

Almost surely, 2^72354949557 is an apocalyptic number.

It is an amenable number.

72354949557 is a deficient number, since it is larger than the sum of its proper divisors (33788708427).

72354949557 is a wasteful number, since it uses less digits than its factorization.

72354949557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33649.

The product of its digits is 47628000, while the sum is 60.

The spelling of 72354949557 in words is "seventy-two billion, three hundred fifty-four million, nine hundred forty-nine thousand, five hundred fifty-seven".