15136378506 has 48 divisors (see below), whose sum is σ = 32940974664. Its totient is φ = 5023130112.

The previous prime is 15136378489. The next prime is 15136378531. The reversal of 15136378506 is 60587363151.

15136378506 is a `hidden beast` number, since 1 + 5 + 1 + 3 + 637 + 8 + 5 + 0 + 6 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 8865164025 + 6271214481 = 94155^2 + 79191^2 .

It is a super-3 number, since 3×15136378506³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

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, 4407366 + ... + 4410798.

Almost surely, 2^15136378506 is an apocalyptic number.

15136378506 is an abundant number, since it is smaller than the sum of its proper divisors (17804596158).

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

15136378506 is a wasteful number, since it uses less digits than its factorization.

15136378506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4455 (or 4452 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 45.

The spelling of 15136378506 in words is "fifteen billion, one hundred thirty-six million, three hundred seventy-eight thousand, five hundred six".