72693734553 has 36 divisors (see below), whose sum is σ = 118947458448. Its totient is φ = 44056765080.

The previous prime is 72693734543. The next prime is 72693734593. The reversal of 72693734553 is 35543739627.

72693734553 is a `hidden beast` number, since 7 + 26 + 9 + 37 + 34 + 553 = 666.

It is not a de Polignac number, because 72693734553 - 2⁵ = 72693734521 is a prime.

It is a super-2 number, since 2×72693734553² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72693734553.

It is not an unprimeable number, because it can be changed into a prime (72693734543) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 431451 + ... + 575792.

It is an arithmetic number, because the mean of its divisors is an integer number (3304096068).

Almost surely, 2^72693734553 is an apocalyptic number.

It is an amenable number.

72693734553 is a deficient number, since it is larger than the sum of its proper divisors (46253723895).

72693734553 is an equidigital number, since it uses as much as digits as its factorization.

72693734553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007278 (or 1007257 counting only the distinct ones).

The product of its digits is 14288400, while the sum is 54.

The spelling of 72693734553 in words is "seventy-two billion, six hundred ninety-three million, seven hundred thirty-four thousand, five hundred fifty-three".