72157898402 has 16 divisors (see below), whose sum is σ = 111894438912. Its totient is φ = 34863212160.

The previous prime is 72157898377. The next prime is 72157898411. The reversal of 72157898402 is 20489875127.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822938 + ... + 906389.

It is an arithmetic number, because the mean of its divisors is an integer number (6993402432).

Almost surely, 2^72157898402 is an apocalyptic number.

72157898402 is a deficient number, since it is larger than the sum of its proper divisors (39736540510).

72157898402 is a wasteful number, since it uses less digits than its factorization.

72157898402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730033.

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 72157898402 in words is "seventy-two billion, one hundred fifty-seven million, eight hundred ninety-eight thousand, four hundred two".