15136513506 has 48 divisors (see below), whose sum is σ = 33590947104. Its totient is φ = 4923398592.

The previous prime is 15136513477. The next prime is 15136513519. The reversal of 15136513506 is 60531563151.

15136513506 is a `hidden beast` number, since 1 + 5 + 136 + 5 + 13 + 506 = 666.

It is a super-3 number, since 3×15136513506³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 840165 + ... + 857991.

It is an arithmetic number, because the mean of its divisors is an integer number (699811398).

Almost surely, 2^15136513506 is an apocalyptic number.

15136513506 is an abundant number, since it is smaller than the sum of its proper divisors (18454433598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15136513506 is a wasteful number, since it uses less digits than its factorization.

15136513506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18975 (or 18972 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The spelling of 15136513506 in words is "fifteen billion, one hundred thirty-six million, five hundred thirteen thousand, five hundred six".