79402972811 has 4 divisors (see below), whose sum is σ = 79409655552. Its totient is φ = 79396290072.

The previous prime is 79402972771. The next prime is 79402972843. The reversal of 79402972811 is 11827920497.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79402972811 is a prime.

It is a super-3 number, since 3×79402972811³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 79402972811.

It is not an unprimeable number, because it can be changed into a prime (79402974811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3323516 + ... + 3347321.

It is an arithmetic number, because the mean of its divisors is an integer number (19852413888).

Almost surely, 2^79402972811 is an apocalyptic number.

79402972811 is a deficient number, since it is larger than the sum of its proper divisors (6682741).

79402972811 is a wasteful number, since it uses less digits than its factorization.

79402972811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6682740.

The product of its (nonzero) digits is 508032, while the sum is 50.

The spelling of 79402972811 in words is "seventy-nine billion, four hundred two million, nine hundred seventy-two thousand, eight hundred eleven".