11815987504 has 40 divisors (see below), whose sum is σ = 23034293568. Its totient is φ = 5871720960.

The previous prime is 11815987459. The next prime is 11815987507. The reversal of 11815987504 is 40578951811.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (11815987507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4685764 + ... + 4688284.

Almost surely, 2^11815987504 is an apocalyptic number.

It is an amenable number.

11815987504 is a deficient number, since it is larger than the sum of its proper divisors (11218306064).

11815987504 is a wasteful number, since it uses less digits than its factorization.

11815987504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213 (or 4207 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 49.

The spelling of 11815987504 in words is "eleven billion, eight hundred fifteen million, nine hundred eighty-seven thousand, five hundred four".