79569008641 has 4 divisors (see below), whose sum is σ = 80341523392. Its totient is φ = 78796493892.

The previous prime is 79569008633. The next prime is 79569008677. The reversal of 79569008641 is 14680096597.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14680096597 = 19 ⋅772636663.

It is a cyclic number.

It is not a de Polignac number, because 79569008641 - 2³ = 79569008633 is a prime.

It is a super-2 number, since 2×79569008641² (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 (79569008681) 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, 386257221 + ... + 386257426.

It is an arithmetic number, because the mean of its divisors is an integer number (20085380848).

Almost surely, 2^79569008641 is an apocalyptic number.

It is an amenable number.

79569008641 is a deficient number, since it is larger than the sum of its proper divisors (772514751).

79569008641 is a wasteful number, since it uses less digits than its factorization.

79569008641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 772514750.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 79569008641 in words is "seventy-nine billion, five hundred sixty-nine million, eight thousand, six hundred forty-one".