80171403665 has 16 divisors (see below), whose sum is σ = 97123418112. Its totient is φ = 63526970304.

The previous prime is 80171403643. The next prime is 80171403667. The reversal of 80171403665 is 56630417108.

It is a cyclic number.

It is not a de Polignac number, because 80171403665 - 2⁶ = 80171403601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80171403667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281447 + ... + 489443.

It is an arithmetic number, because the mean of its divisors is an integer number (6070213632).

Almost surely, 2^80171403665 is an apocalyptic number.

It is an amenable number.

80171403665 is a deficient number, since it is larger than the sum of its proper divisors (16952014447).

80171403665 is a wasteful number, since it uses less digits than its factorization.

80171403665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208736.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 80171403665 in words is "eighty billion, one hundred seventy-one million, four hundred three thousand, six hundred sixty-five".