11620643520 has 56 divisors (see below), whose sum is σ = 36895546224. Its totient is φ = 3098838016.

The previous prime is 11620643519. The next prime is 11620643527. The reversal of 11620643520 is 2534602611.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (11620643527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6051459 + ... + 6053378.

Almost surely, 2^11620643520 is an apocalyptic number.

11620643520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11620643520 is an abundant number, since it is smaller than the sum of its proper divisors (25274902704).

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

11620643520 is a wasteful number, since it uses less digits than its factorization.

11620643520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12104857 (or 12104847 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 11620643520 in words is "eleven billion, six hundred twenty million, six hundred forty-three thousand, five hundred twenty".