11457171880 has 128 divisors (see below), whose sum is σ = 32580506880. Its totient is φ = 3522078720.

The previous prime is 11457171857. The next prime is 11457171919. The reversal of 11457171880 is 8817175411.

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, 199362 + ... + 250318.

It is an arithmetic number, because the mean of its divisors is an integer number (254535210).

Almost surely, 2^11457171880 is an apocalyptic number.

11457171880 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 11457171880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16290253440).

11457171880 is an abundant number, since it is smaller than the sum of its proper divisors (21123335000).

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

11457171880 is a wasteful number, since it uses less digits than its factorization.

11457171880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51059 (or 51055 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 43.

The spelling of 11457171880 in words is "eleven billion, four hundred fifty-seven million, one hundred seventy-one thousand, eight hundred eighty".