80515939 has 16 divisors (see below), whose sum is σ = 101076480. Its totient is φ = 62536320.

The previous prime is 80515921. The next prime is 80515951. The reversal of 80515939 is 93951508.

It is not a de Polignac number, because 80515939 - 2⁵ = 80515907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80515979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10102 + ... + 16219.

It is an arithmetic number, because the mean of its divisors is an integer number (6317280).

Almost surely, 2^80515939 is an apocalyptic number.

80515939 is a deficient number, since it is larger than the sum of its proper divisors (20560541).

80515939 is a wasteful number, since it uses less digits than its factorization.

80515939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26370.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 80515939 is about 8973.0674242424. The cubic root of 80515939 is about 431.8112512061.

The spelling of 80515939 in words is "eighty million, five hundred fifteen thousand, nine hundred thirty-nine".