81537746119995 has 32 divisors (see below), whose sum is σ = 149810978522880. Its totient is φ = 37452744627840.

The previous prime is 81537746119981. The next prime is 81537746119997. The reversal of 81537746119995 is 59991164773518.

It is not a de Polignac number, because 81537746119995 - 2¹³ = 81537746111803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81537746119997) 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 31 ways as a sum of consecutive naturals, for example, 13004422084 + ... + 13004428353.

It is an arithmetic number, because the mean of its divisors is an integer number (4681593078840).

Almost surely, 2^{81537746119995} is an apocalyptic number.

81537746119995 is a deficient number, since it is larger than the sum of its proper divisors (68273232402885).

81537746119995 is a wasteful number, since it uses less digits than its factorization.

81537746119995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26008850475.

The product of its digits is 514382400, while the sum is 75.

The spelling of 81537746119995 in words is "eighty-one trillion, five hundred thirty-seven billion, seven hundred forty-six million, one hundred nineteen thousand, nine hundred ninety-five".