81537926115 has 64 divisors (see below), whose sum is σ = 139685575680. Its totient is φ = 40471756800.

The previous prime is 81537926089. The next prime is 81537926131. The reversal of 81537926115 is 51162973518.

It is not a de Polignac number, because 81537926115 - 2¹⁵ = 81537893347 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 63 ways as a sum of consecutive naturals, for example, 9104890 + ... + 9113840.

It is an arithmetic number, because the mean of its divisors is an integer number (2182587120).

Almost surely, 2^81537926115 is an apocalyptic number.

81537926115 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

81537926115 is a deficient number, since it is larger than the sum of its proper divisors (58147649565).

81537926115 is a wasteful number, since it uses less digits than its factorization.

81537926115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9372.

The product of its digits is 453600, while the sum is 48.

The spelling of 81537926115 in words is "eighty-one billion, five hundred thirty-seven million, nine hundred twenty-six thousand, one hundred fifteen".