81077045595903 has 32 divisors (see below), whose sum is σ = 137280839385600. Its totient is φ = 46327197388608.

The previous prime is 81077045595877. The next prime is 81077045595913. The reversal of 81077045595903 is 30959554077018.

81077045595903 is a `hidden beast` number, since 8 + 1 + 0 + 7 + 7 + 0 + 455 + 95 + 90 + 3 = 666.

It is not a de Polignac number, because 81077045595903 - 2⁹ = 81077045595391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81077045595913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8317773 + ... + 15209846.

It is an arithmetic number, because the mean of its divisors is an integer number (4290026230800).

Almost surely, 2^{81077045595903} is an apocalyptic number.

81077045595903 is a deficient number, since it is larger than the sum of its proper divisors (56203793789697).

81077045595903 is a wasteful number, since it uses less digits than its factorization.

81077045595903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23545868 (or 23545862 counting only the distinct ones).

The product of its (nonzero) digits is 47628000, while the sum is 63.

The spelling of 81077045595903 in words is "eighty-one trillion, seventy-seven billion, forty-five million, five hundred ninety-five thousand, nine hundred three".