15138123874 has 32 divisors (see below), whose sum is σ = 23566152960. Its totient is φ = 7288925952.

The previous prime is 15138123857. The next prime is 15138123881. The reversal of 15138123874 is 47832183151.

It is a super-3 number, since 3×15138123874³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15138123874.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1471332 + ... + 1481584.

It is an arithmetic number, because the mean of its divisors is an integer number (736442280).

Almost surely, 2^15138123874 is an apocalyptic number.

15138123874 is a deficient number, since it is larger than the sum of its proper divisors (8428029086).

15138123874 is a wasteful number, since it uses less digits than its factorization.

15138123874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10554.

The product of its digits is 161280, while the sum is 43.

The spelling of 15138123874 in words is "fifteen billion, one hundred thirty-eight million, one hundred twenty-three thousand, eight hundred seventy-four".