11640650550 has 48 divisors (see below), whose sum is σ = 30566985552. Its totient is φ = 2921574400.

The previous prime is 11640650537. The next prime is 11640650597. The reversal of 11640650550 is 5505604611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2279931 + ... + 2285030.

It is an arithmetic number, because the mean of its divisors is an integer number (636812199).

Almost surely, 2^11640650550 is an apocalyptic number.

11640650550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11640650550 is an abundant number, since it is smaller than the sum of its proper divisors (18926335002).

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

11640650550 is a wasteful number, since it uses less digits than its factorization.

11640650550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4564993 (or 4564988 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 33.

The spelling of 11640650550 in words is "eleven billion, six hundred forty million, six hundred fifty thousand, five hundred fifty".