15881136084065 has 48 divisors (see below), whose sum is σ = 22467308463360. Its totient is φ = 10554561655680.

The previous prime is 15881136084043. The next prime is 15881136084067. The reversal of 15881136084065 is 56048063118851.

It is not a de Polignac number, because 15881136084065 - 2¹² = 15881136079969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15881136084065.

It is not an unprimeable number, because it can be changed into a prime (15881136084067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7732331 + ... + 9568239.

It is an arithmetic number, because the mean of its divisors is an integer number (468068926320).

Almost surely, 2^{15881136084065} is an apocalyptic number.

It is an amenable number.

15881136084065 is a deficient number, since it is larger than the sum of its proper divisors (6586172379295).

15881136084065 is an equidigital number, since it uses as much as digits as its factorization.

15881136084065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836110 (or 1836051 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 56.

The spelling of 15881136084065 in words is "fifteen trillion, eight hundred eighty-one billion, one hundred thirty-six million, eighty-four thousand, sixty-five".