138503577815 has 16 divisors (see below), whose sum is σ = 168665269248. Its totient is φ = 109169490336.

The previous prime is 138503577803. The next prime is 138503577857. The reversal of 138503577815 is 518775305831.

It is a cyclic number.

It is not a de Polignac number, because 138503577815 - 2³² = 134208610519 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 302387 + ... + 606996.

It is an arithmetic number, because the mean of its divisors is an integer number (10541579328).

Almost surely, 2^138503577815 is an apocalyptic number.

138503577815 is a deficient number, since it is larger than the sum of its proper divisors (30161691433).

138503577815 is an equidigital number, since it uses as much as digits as its factorization.

138503577815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909838.

The product of its (nonzero) digits is 3528000, while the sum is 53.

The spelling of 138503577815 in words is "one hundred thirty-eight billion, five hundred three million, five hundred seventy-seven thousand, eight hundred fifteen".