11686521604 has 12 divisors (see below), whose sum is σ = 20569630284. Its totient is φ = 5809484384.

The previous prime is 11686521593. The next prime is 11686521611. The reversal of 11686521604 is 40612568611.

It can be written as a sum of positive squares in 2 ways, for example, as 6502809600 + 5183712004 = 80640^2 + 71998^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8443327 + ... + 8444710.

It is an arithmetic number, because the mean of its divisors is an integer number (1714135857).

Almost surely, 2^11686521604 is an apocalyptic number.

It is an amenable number.

11686521604 is a deficient number, since it is larger than the sum of its proper divisors (8883108680).

11686521604 is a wasteful number, since it uses less digits than its factorization.

11686521604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16888214 (or 16888212 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 11686521604 in words is "eleven billion, six hundred eighty-six million, five hundred twenty-one thousand, six hundred four".