81850402362774 has 16 divisors (see below), whose sum is σ = 164036946014208. Its totient is φ = 27227443906152.

The previous prime is 81850402362737. The next prime is 81850402362857. The reversal of 81850402362774 is 47726320405818.

It is a congruent number.

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, 14005883862 + ... + 14005889705.

It is an arithmetic number, because the mean of its divisors is an integer number (10252309125888).

Almost surely, 2^{81850402362774} is an apocalyptic number.

81850402362774 is an abundant number, since it is smaller than the sum of its proper divisors (82186543651434).

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

81850402362774 is a wasteful number, since it uses less digits than its factorization.

81850402362774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28011774059.

The product of its (nonzero) digits is 18063360, while the sum is 57.

The spelling of 81850402362774 in words is "eighty-one trillion, eight hundred fifty billion, four hundred two million, three hundred sixty-two thousand, seven hundred seventy-four".