79561452407 has 4 divisors (see below), whose sum is σ = 79562017560. Its totient is φ = 79560887256.

The previous prime is 79561452403. The next prime is 79561452457. The reversal of 79561452407 is 70425416597.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 79561452407 - 2² = 79561452403 is a prime.

It is a super-2 number, since 2×79561452407² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79561452403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115844 + ... + 415382.

It is an arithmetic number, because the mean of its divisors is an integer number (19890504390).

Almost surely, 2^79561452407 is an apocalyptic number.

79561452407 is a deficient number, since it is larger than the sum of its proper divisors (565153).

79561452407 is a wasteful number, since it uses less digits than its factorization.

79561452407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565152.

The product of its (nonzero) digits is 2116800, while the sum is 50.

The spelling of 79561452407 in words is "seventy-nine billion, five hundred sixty-one million, four hundred fifty-two thousand, four hundred seven".