11655520650 has 48 divisors (see below), whose sum is σ = 32117438400. Its totient is φ = 3108138480.

The previous prime is 11655520633. The next prime is 11655520651. The reversal of 11655520650 is 5602555611.

11655520650 is a `hidden beast` number, since 11 + 65 + 5 + 520 + 65 + 0 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11655520651) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4315510 + ... + 4318209.

It is an arithmetic number, because the mean of its divisors is an integer number (669113300).

Almost surely, 2^11655520650 is an apocalyptic number.

11655520650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11655520650 is an abundant number, since it is smaller than the sum of its proper divisors (20461917750).

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

11655520650 is a wasteful number, since it uses less digits than its factorization.

11655520650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8633740 (or 8633729 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 11655520650 in words is "eleven billion, six hundred fifty-five million, five hundred twenty thousand, six hundred fifty".