11621957760 has 320 divisors, whose sum is σ = 47434749120. Its totient is φ = 2656364544.

The previous prime is 11621957749. The next prime is 11621957783. The reversal of 11621957760 is 6775912611.

11621957760 is a `hidden beast` number, since 1 + 1 + 6 + 2 + 19 + 577 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (320).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 346867 + ... + 378893.

It is an arithmetic number, because the mean of its divisors is an integer number (148233591).

Almost surely, 2^11621957760 is an apocalyptic number.

11621957760 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 11621957760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23717374560).

11621957760 is an abundant number, since it is smaller than the sum of its proper divisors (35812791360).

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

11621957760 is an equidigital number, since it uses as much as digits as its factorization.

11621957760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32065 (or 32044 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The spelling of 11621957760 in words is "eleven billion, six hundred twenty-one million, nine hundred fifty-seven thousand, seven hundred sixty".