11551864808 has 16 divisors (see below), whose sum is σ = 23628814560. Its totient is φ = 5250847600.

The previous prime is 11551864783. The next prime is 11551864829. The reversal of 11551864808 is 80846815511.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65635508 + ... + 65635683.

It is an arithmetic number, because the mean of its divisors is an integer number (1476800910).

Almost surely, 2^11551864808 is an apocalyptic number.

It is an amenable number.

11551864808 is an abundant number, since it is smaller than the sum of its proper divisors (12076949752).

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

11551864808 is a wasteful number, since it uses less digits than its factorization.

11551864808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131271208 (or 131271204 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 47.

The spelling of 11551864808 in words is "eleven billion, five hundred fifty-one million, eight hundred sixty-four thousand, eight hundred eight".