80809907399065 has 32 divisors (see below), whose sum is σ = 106693267516416. Its totient is φ = 58383389475840.

The previous prime is 80809907398993. The next prime is 80809907399069. The reversal of 80809907399065 is 56099370990808.

It is not a de Polignac number, because 80809907399065 - 2⁷ = 80809907398937 is a prime.

It is a super-2 number, since 2×80809907399065² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80809907399069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3168945 + ... + 13101985.

It is an arithmetic number, because the mean of its divisors is an integer number (3334164609888).

Almost surely, 2^{80809907399065} is an apocalyptic number.

It is an amenable number.

80809907399065 is a deficient number, since it is larger than the sum of its proper divisors (25883360117351).

80809907399065 is a wasteful number, since it uses less digits than its factorization.

80809907399065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9935769.

The product of its (nonzero) digits is 264539520, while the sum is 73.

The spelling of 80809907399065 in words is "eighty trillion, eight hundred nine billion, nine hundred seven million, three hundred ninety-nine thousand, sixty-five".