72157100205518 has 8 divisors (see below), whose sum is σ = 108335223126912. Its totient is φ = 36045359163216.

The previous prime is 72157100205497. The next prime is 72157100205607. The reversal of 72157100205518 is 81550200175127.

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

It is a super-2 number, since 2×72157100205518² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16595467055 + ... + 16595471402.

It is an arithmetic number, because the mean of its divisors is an integer number (13541902890864).

Almost surely, 2^{72157100205518} is an apocalyptic number.

72157100205518 is a deficient number, since it is larger than the sum of its proper divisors (36178122921394).

72157100205518 is a wasteful number, since it uses less digits than its factorization.

72157100205518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33190939546.

The product of its (nonzero) digits is 196000, while the sum is 44.

The spelling of 72157100205518 in words is "seventy-two trillion, one hundred fifty-seven billion, one hundred million, two hundred five thousand, five hundred eighteen".