80879566597809 has 64 divisors (see below), whose sum is σ = 131497818439680. Its totient is φ = 43163937423360.

The previous prime is 80879566597783. The next prime is 80879566597847. The reversal of 80879566597809 is 90879566597808.

It is a happy number.

It is not a de Polignac number, because 80879566597809 - 2⁵ = 80879566597777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80879566592809) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1267494097 + ... + 1267557905.

It is an arithmetic number, because the mean of its divisors is an integer number (2054653413120).

Almost surely, 2^{80879566597809} is an apocalyptic number.

It is an amenable number.

80879566597809 is a deficient number, since it is larger than the sum of its proper divisors (50618251841871).

80879566597809 is a wasteful number, since it uses less digits than its factorization.

80879566597809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91070.

The product of its (nonzero) digits is 16460236800, while the sum is 87.

Subtracting 80879566597809 from its reverse (90879566597808), we obtain a palindrome (9999999999999).

The spelling of 80879566597809 in words is "eighty trillion, eight hundred seventy-nine billion, five hundred sixty-six million, five hundred ninety-seven thousand, eight hundred nine".