11867506587 has 10 divisors (see below), whose sum is σ = 17728003788. Its totient is φ = 7911671004.

The previous prime is 11867506549. The next prime is 11867506589. The reversal of 11867506587 is 78560576811.

11867506587 is a `hidden beast` number, since 1 + 1 + 8 + 6 + 7 + 50 + 6 + 587 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-11867506587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11867506589) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 73256133 + ... + 73256294.

Almost surely, 2^11867506587 is an apocalyptic number.

11867506587 is a deficient number, since it is larger than the sum of its proper divisors (5860497201).

11867506587 is an equidigital number, since it uses as much as digits as its factorization.

11867506587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146512439 (or 146512430 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 54.

The spelling of 11867506587 in words is "eleven billion, eight hundred sixty-seven million, five hundred six thousand, five hundred eighty-seven".