11639887845 has 32 divisors (see below), whose sum is σ = 19863335808. Its totient is φ = 5800101888.

The previous prime is 11639887801. The next prime is 11639887859. The reversal of 11639887845 is 54878893611.

It is not a de Polignac number, because 11639887845 - 2⁷ = 11639887717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131659 + ... + 201528.

It is an arithmetic number, because the mean of its divisors is an integer number (620729244).

Almost surely, 2^11639887845 is an apocalyptic number.

11639887845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11639887845 is a deficient number, since it is larger than the sum of its proper divisors (8223447963).

11639887845 is a wasteful number, since it uses less digits than its factorization.

11639887845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333349.

The product of its digits is 11612160, while the sum is 60.

The spelling of 11639887845 in words is "eleven billion, six hundred thirty-nine million, eight hundred eighty-seven thousand, eight hundred forty-five".