81513103276160 has 64 divisors (see below), whose sum is σ = 194874677858880. Its totient is φ = 32604000574464.

The previous prime is 81513103276127. The next prime is 81513103276181. The reversal of 81513103276160 is 6167230131518.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×81513103276160² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14500619 + ... + 19320821.

It is an arithmetic number, because the mean of its divisors is an integer number (3044916841545).

Almost surely, 2^{81513103276160} is an apocalyptic number.

81513103276160 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81513103276160 is an abundant number, since it is smaller than the sum of its proper divisors (113361574582720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81513103276160 is a wasteful number, since it uses less digits than its factorization.

81513103276160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4846645 (or 4846633 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 81513103276160 in words is "eighty-one trillion, five hundred thirteen billion, one hundred three million, two hundred seventy-six thousand, one hundred sixty".