79902421042 has 16 divisors (see below), whose sum is σ = 124015147200. Its totient is φ = 38564674960.

The previous prime is 79902421033. The next prime is 79902421069. The reversal of 79902421042 is 24012420997.

It is a junction number, because it is equal to n+sod(n) for n = 79902420986 and 79902421004.

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, 97809 + ... + 411547.

It is an arithmetic number, because the mean of its divisors is an integer number (7750946700).

Almost surely, 2^79902421042 is an apocalyptic number.

79902421042 is a deficient number, since it is larger than the sum of its proper divisors (44112726158).

79902421042 is a wasteful number, since it uses less digits than its factorization.

79902421042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318161.

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 79902421042 in words is "seventy-nine billion, nine hundred two million, four hundred twenty-one thousand, forty-two".