79902021038 has 16 divisors (see below), whose sum is σ = 138904118784. Its totient is φ = 33761416920.

The previous prime is 79902021029. The next prime is 79902021041. The reversal of 79902021038 is 83012020997.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 79902020986 and 79902021004.

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, 40191170 + ... + 40193157.

It is an arithmetic number, because the mean of its divisors is an integer number (8681507424).

Almost surely, 2^79902021038 is an apocalyptic number.

79902021038 is a deficient number, since it is larger than the sum of its proper divisors (59002097746).

79902021038 is a wasteful number, since it uses less digits than its factorization.

79902021038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80384407.

The product of its (nonzero) digits is 54432, while the sum is 41.

Subtracting from 79902021038 its sum of digits (41), we obtain a palindrome (79902020997).

The spelling of 79902021038 in words is "seventy-nine billion, nine hundred two million, twenty-one thousand, thirty-eight".