11111352980 has 96 divisors (see below), whose sum is σ = 28746896640. Its totient is φ = 3513093120.

The previous prime is 11111352977. The next prime is 11111352991. The reversal of 11111352980 is 8925311111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2347256 + ... + 2351984.

It is an arithmetic number, because the mean of its divisors is an integer number (299446840).

Almost surely, 2^11111352980 is an apocalyptic number.

11111352980 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 11111352980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14373448320).

11111352980 is an abundant number, since it is smaller than the sum of its proper divisors (17635543660).

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

11111352980 is a wasteful number, since it uses less digits than its factorization.

11111352980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6049 (or 6047 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 32.

The spelling of 11111352980 in words is "eleven billion, one hundred eleven million, three hundred fifty-two thousand, nine hundred eighty".