138845307515 has 32 divisors (see below), whose sum is σ = 174307049280. Its totient is φ = 106087168000.

The previous prime is 138845307473. The next prime is 138845307529. The reversal of 138845307515 is 515703548831.

It is a de Polignac number, because none of the positive numbers 2^k-138845307515 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, 1805072 + ... + 1880418.

It is an arithmetic number, because the mean of its divisors is an integer number (5447095290).

Almost surely, 2^138845307515 is an apocalyptic number.

138845307515 is a deficient number, since it is larger than the sum of its proper divisors (35461741765).

138845307515 is a wasteful number, since it uses less digits than its factorization.

138845307515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75583.

The product of its (nonzero) digits is 2016000, while the sum is 50.

The spelling of 138845307515 in words is "one hundred thirty-eight billion, eight hundred forty-five million, three hundred seven thousand, five hundred fifteen".