815142939039 has 24 divisors (see below), whose sum is σ = 1383272868432. Its totient is φ = 456024021120.

The previous prime is 815142939019. The next prime is 815142939043. The reversal of 815142939039 is 930939241518.

815142939039 is a `hidden beast` number, since 8 + 1 + 514 + 2 + 9 + 3 + 90 + 39 = 666.

It is not a de Polignac number, because 815142939039 - 2⁵ = 815142939007 is a prime.

It is a super-2 number, since 2×815142939039² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (815142939019) 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 23 ways as a sum of consecutive naturals, for example, 316682062 + ... + 316684635.

It is an arithmetic number, because the mean of its divisors is an integer number (57636369518).

Almost surely, 2^815142939039 is an apocalyptic number.

815142939039 is a deficient number, since it is larger than the sum of its proper divisors (568129929393).

815142939039 is a wasteful number, since it uses less digits than its factorization.

815142939039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633366727 (or 633366724 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 815142939039 in words is "eight hundred fifteen billion, one hundred forty-two million, nine hundred thirty-nine thousand, thirty-nine".