15138500535 has 32 divisors (see below), whose sum is σ = 26975148480. Its totient is φ = 8055189504.

The previous prime is 15138500521. The next prime is 15138500539. The reversal of 15138500535 is 53500583151.

15138500535 is a `hidden beast` number, since 15 + 138 + 500 + 5 + 3 + 5 = 666.

It is not a de Polignac number, because 15138500535 - 2⁴ = 15138500519 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15138500535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15138500539) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71034 + ... + 187943.

It is an arithmetic number, because the mean of its divisors is an integer number (842973390).

Almost surely, 2^15138500535 is an apocalyptic number.

15138500535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15138500535 is a deficient number, since it is larger than the sum of its proper divisors (11836647945).

15138500535 is a wasteful number, since it uses less digits than its factorization.

15138500535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259424 (or 259418 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 15138500535 in words is "fifteen billion, one hundred thirty-eight million, five hundred thousand, five hundred thirty-five".