138110813515 has 32 divisors (see below), whose sum is σ = 177292684800. Its totient is φ = 102981818880.

The previous prime is 138110813473. The next prime is 138110813531. The reversal of 138110813515 is 515318011831.

It is not a de Polignac number, because 138110813515 - 2¹¹ = 138110811467 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1863946 + ... + 1936624.

It is an arithmetic number, because the mean of its divisors is an integer number (5540396400).

Almost surely, 2^138110813515 is an apocalyptic number.

138110813515 is a deficient number, since it is larger than the sum of its proper divisors (39181871285).

138110813515 is a wasteful number, since it uses less digits than its factorization.

138110813515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73027.

The product of its (nonzero) digits is 14400, while the sum is 37.

The spelling of 138110813515 in words is "one hundred thirty-eight billion, one hundred ten million, eight hundred thirteen thousand, five hundred fifteen".