72978113902 has 16 divisors (see below), whose sum is σ = 114630261120. Its totient is φ = 34779239352.

The previous prime is 72978113881. The next prime is 72978113939. The reversal of 72978113902 is 20931187927.

It is a congruent 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, 2789952 + ... + 2815987.

It is an arithmetic number, because the mean of its divisors is an integer number (7164391320).

Almost surely, 2^72978113902 is an apocalyptic number.

72978113902 is a deficient number, since it is larger than the sum of its proper divisors (41652147218).

72978113902 is a wasteful number, since it uses less digits than its factorization.

72978113902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5606247.

The product of its (nonzero) digits is 381024, while the sum is 49.

The spelling of 72978113902 in words is "seventy-two billion, nine hundred seventy-eight million, one hundred thirteen thousand, nine hundred two".