72510745924 has 6 divisors (see below), whose sum is σ = 126893805374. Its totient is φ = 36255372960.

The previous prime is 72510745919. The next prime is 72510745927. The reversal of 72510745924 is 42954701527.

It can be written as a sum of positive squares in only one way, i.e., 72081510400 + 429235524 = 268480^2 + 20718^2 .

It is a super-2 number, since 2×72510745924² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72510745927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9063843237 + ... + 9063843244.

Almost surely, 2^72510745924 is an apocalyptic number.

It is an amenable number.

72510745924 is a deficient number, since it is larger than the sum of its proper divisors (54383059450).

72510745924 is a wasteful number, since it uses less digits than its factorization.

72510745924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18127686485 (or 18127686483 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 46.

The spelling of 72510745924 in words is "seventy-two billion, five hundred ten million, seven hundred forty-five thousand, nine hundred twenty-four".