815426155044 has 18 divisors (see below), whose sum is σ = 2061216114230. Its totient is φ = 271808718336.

The previous prime is 815426155043. The next prime is 815426155069. The reversal of 815426155044 is 440551624518.

815426155044 is a `hidden beast` number, since 8 + 1 + 54 + 2 + 6 + 1 + 550 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 788032594944 + 27393560100 = 887712^2 + 165510^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (815426155043) 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 5 ways as a sum of consecutive naturals, for example, 11325363229 + ... + 11325363300.

Almost surely, 2^815426155044 is an apocalyptic number.

It is an amenable number.

815426155044 is an abundant number, since it is smaller than the sum of its proper divisors (1245789959186).

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

815426155044 is a wasteful number, since it uses less digits than its factorization.

815426155044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22650726539 (or 22650726534 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 45.

The spelling of 815426155044 in words is "eight hundred fifteen billion, four hundred twenty-six million, one hundred fifty-five thousand, forty-four".