15408726138 has 48 divisors (see below), whose sum is σ = 36008612640. Its totient is φ = 4733904672.

The previous prime is 15408726131. The next prime is 15408726161. The reversal of 15408726138 is 83162780451.

15408726138 is a `hidden beast` number, since 1 + 540 + 8 + 72 + 6 + 1 + 38 = 666.

15408726138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15408726093 and 15408726102.

It is not an unprimeable number, because it can be changed into a prime (15408726131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104245 + ... + 204167.

It is an arithmetic number, because the mean of its divisors is an integer number (750179430).

Almost surely, 2^15408726138 is an apocalyptic number.

15408726138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

15408726138 is an abundant number, since it is smaller than the sum of its proper divisors (20599886502).

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

15408726138 is a wasteful number, since it uses less digits than its factorization.

15408726138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100603 (or 100600 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 15408726138 in words is "fifteen billion, four hundred eight million, seven hundred twenty-six thousand, one hundred thirty-eight".