79239864481 has 4 divisors (see below), whose sum is σ = 79372152000. Its totient is φ = 79107576964.

The previous prime is 79239864469. The next prime is 79239864547. The reversal of 79239864481 is 18446893297.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79239864481 is a prime.

It is a super-2 number, since 2×79239864481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79239814481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66142861 + ... + 66144058.

It is an arithmetic number, because the mean of its divisors is an integer number (19843038000).

Almost surely, 2^79239864481 is an apocalyptic number.

It is an amenable number.

79239864481 is a deficient number, since it is larger than the sum of its proper divisors (132287519).

79239864481 is a wasteful number, since it uses less digits than its factorization.

79239864481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132287518.

The product of its digits is 20901888, while the sum is 61.

The spelling of 79239864481 in words is "seventy-nine billion, two hundred thirty-nine million, eight hundred sixty-four thousand, four hundred eighty-one".