72111188493 has 32 divisors (see below), whose sum is σ = 107547454080. Its totient is φ = 47752657920.

The previous prime is 72111188437. The next prime is 72111188519. The reversal of 72111188493 is 39488111127.

It is a happy number.

72111188493 is a `hidden beast` number, since 72 + 1 + 1 + 11 + 88 + 493 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-72111188493 is a prime.

It is a super-2 number, since 2×72111188493² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72111188423) 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, 3548983 + ... + 3569243.

It is an arithmetic number, because the mean of its divisors is an integer number (3360857940).

Almost surely, 2^72111188493 is an apocalyptic number.

It is an amenable number.

72111188493 is a deficient number, since it is larger than the sum of its proper divisors (35436265587).

72111188493 is a wasteful number, since it uses less digits than its factorization.

72111188493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21146 (or 21140 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The spelling of 72111188493 in words is "seventy-two billion, one hundred eleven million, one hundred eighty-eight thousand, four hundred ninety-three".