72839973645878 has 8 divisors (see below), whose sum is σ = 109552882615968. Its totient is φ = 36322346107224.

The previous prime is 72839973645793. The next prime is 72839973645961. The reversal of 72839973645878 is 87854637993827.

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

It is a self number, because there is not a number n which added to its sum of digits gives 72839973645878.

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, 48820356926 + ... + 48820358417.

It is an arithmetic number, because the mean of its divisors is an integer number (13694110326996).

Almost surely, 2^{72839973645878} is an apocalyptic number.

72839973645878 is a deficient number, since it is larger than the sum of its proper divisors (36712908970090).

72839973645878 is a wasteful number, since it uses less digits than its factorization.

72839973645878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97640715718.

The product of its digits is 30725775360, while the sum is 86.

The spelling of 72839973645878 in words is "seventy-two trillion, eight hundred thirty-nine billion, nine hundred seventy-three million, six hundred forty-five thousand, eight hundred seventy-eight".