11621615500 has 96 divisors (see below), whose sum is σ = 27964512576. Its totient is φ = 4184000000.

The previous prime is 11621615477. The next prime is 11621615501. The reversal of 11621615500 is 551612611.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11621615501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 545040 + ... + 565960.

It is an arithmetic number, because the mean of its divisors is an integer number (291297006).

Almost surely, 2^11621615500 is an apocalyptic number.

11621615500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11621615500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13982256288).

11621615500 is an abundant number, since it is smaller than the sum of its proper divisors (16342897076).

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

11621615500 is a wasteful number, since it uses less digits than its factorization.

11621615500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21052 (or 21040 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 28.

The spelling of 11621615500 in words is "eleven billion, six hundred twenty-one million, six hundred fifteen thousand, five hundred".