11621220672 has 224 divisors, whose sum is σ = 34154376192. Its totient is φ = 3468681216.

The previous prime is 11621220671. The next prime is 11621220679. The reversal of 11621220672 is 27602212611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621220671) 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, 21245103 + ... + 21245649.

Almost surely, 2^11621220672 is an apocalyptic number.

11621220672 is a gapful number since it is divisible by the number (12) 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 11621220672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17077188096).

11621220672 is an abundant number, since it is smaller than the sum of its proper divisors (22533155520).

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

11621220672 is a wasteful number, since it uses less digits than its factorization.

11621220672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885 (or 875 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The spelling of 11621220672 in words is "eleven billion, six hundred twenty-one million, two hundred twenty thousand, six hundred seventy-two".