81037517315 has 16 divisors (see below), whose sum is σ = 97466263200. Its totient is φ = 64682661120.

The previous prime is 81037517299. The next prime is 81037517347. The reversal of 81037517315 is 51371573018.

It is not a de Polignac number, because 81037517315 - 2⁴ = 81037517299 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5233685 + ... + 5249145.

It is an arithmetic number, because the mean of its divisors is an integer number (6091641450).

Almost surely, 2^81037517315 is an apocalyptic number.

81037517315 is a deficient number, since it is larger than the sum of its proper divisors (16428745885).

81037517315 is a wasteful number, since it uses less digits than its factorization.

81037517315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17782.

The product of its (nonzero) digits is 88200, while the sum is 41.

The spelling of 81037517315 in words is "eighty-one billion, thirty-seven million, five hundred seventeen thousand, three hundred fifteen".