138895012515 has 32 divisors (see below), whose sum is σ = 254000908800. Its totient is φ = 63489498624.

The previous prime is 138895012511. The next prime is 138895012519. The reversal of 138895012515 is 515210598831.

It is an interprime number because it is at equal distance from previous prime (138895012511) and next prime (138895012519).

It is not a de Polignac number, because 138895012515 - 2² = 138895012511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138895012511) 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 31 ways as a sum of consecutive naturals, for example, 1363836 + ... + 1462134.

It is an arithmetic number, because the mean of its divisors is an integer number (7937528400).

Almost surely, 2^138895012515 is an apocalyptic number.

138895012515 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138895012515 is a deficient number, since it is larger than the sum of its proper divisors (115105896285).

138895012515 is a wasteful number, since it uses less digits than its factorization.

138895012515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111771.

The product of its (nonzero) digits is 432000, while the sum is 48.

The spelling of 138895012515 in words is "one hundred thirty-eight billion, eight hundred ninety-five million, twelve thousand, five hundred fifteen".