80984017905 has 32 divisors (see below), whose sum is σ = 148101832704. Its totient is φ = 37017072576.

The previous prime is 80984017871. The next prime is 80984017921. The reversal of 80984017905 is 50971048908.

It is not a de Polignac number, because 80984017905 - 2¹⁴ = 80984001521 is a prime.

It is a super-2 number, since 2×80984017905² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1007844 + ... + 1085226.

It is an arithmetic number, because the mean of its divisors is an integer number (4628182272).

Almost surely, 2^80984017905 is an apocalyptic number.

It is an amenable number.

80984017905 is a deficient number, since it is larger than the sum of its proper divisors (67117814799).

80984017905 is a wasteful number, since it uses less digits than its factorization.

80984017905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87365.

The product of its (nonzero) digits is 725760, while the sum is 51.

The spelling of 80984017905 in words is "eighty billion, nine hundred eighty-four million, seventeen thousand, nine hundred five".