72878718535 has 8 divisors (see below), whose sum is σ = 99947956896. Its totient is φ = 49973978400.

The previous prime is 72878718529. The next prime is 72878718547. The reversal of 72878718535 is 53581787827.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72878718535 - 2¹⁵ = 72878685767 is a prime.

It is a super-2 number, since 2×72878718535² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1041124516 + ... + 1041124585.

It is an arithmetic number, because the mean of its divisors is an integer number (12493494612).

Almost surely, 2^72878718535 is an apocalyptic number.

72878718535 is a deficient number, since it is larger than the sum of its proper divisors (27069238361).

72878718535 is a wasteful number, since it uses less digits than its factorization.

72878718535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082249113.

The product of its digits is 26342400, while the sum is 61.

The spelling of 72878718535 in words is "seventy-two billion, eight hundred seventy-eight million, seven hundred eighteen thousand, five hundred thirty-five".