81036807735 has 32 divisors (see below), whose sum is σ = 139738959360. Its totient is φ = 39864670848.

The previous prime is 81036807703. The next prime is 81036807737. The reversal of 81036807735 is 53770863018.

It is not a de Polignac number, because 81036807735 - 2⁵ = 81036807703 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81036807737) 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, 99672 + ... + 414738.

It is an arithmetic number, because the mean of its divisors is an integer number (4366842480).

Almost surely, 2^81036807735 is an apocalyptic number.

81036807735 is a deficient number, since it is larger than the sum of its proper divisors (58702151625).

81036807735 is a wasteful number, since it uses less digits than its factorization.

81036807735 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316407.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 81036807735 in words is "eighty-one billion, thirty-six million, eight hundred seven thousand, seven hundred thirty-five".