72991739075 has 24 divisors (see below), whose sum is σ = 93100707840. Its totient is φ = 56739693600.

The previous prime is 72991739071. The next prime is 72991739089. The reversal of 72991739075 is 57093719927.

It is not a de Polignac number, because 72991739075 - 2² = 72991739071 is a prime.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (72991739071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60131 + ... + 386780.

It is an arithmetic number, because the mean of its divisors is an integer number (3879196160).

Almost surely, 2^72991739075 is an apocalyptic number.

72991739075 is a deficient number, since it is larger than the sum of its proper divisors (20108968765).

72991739075 is a wasteful number, since it uses less digits than its factorization.

72991739075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447107 (or 447102 counting only the distinct ones).

The product of its (nonzero) digits is 7501410, while the sum is 59.

The spelling of 72991739075 in words is "seventy-two billion, nine hundred ninety-one million, seven hundred thirty-nine thousand, seventy-five".