11157543980 has 24 divisors (see below), whose sum is σ = 25560919440. Its totient is φ = 4057288640.

The previous prime is 11157543959. The next prime is 11157544009. The reversal of 11157543980 is 8934575111.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25357835 + ... + 25358274.

It is an arithmetic number, because the mean of its divisors is an integer number (1065038310).

Almost surely, 2^11157543980 is an apocalyptic number.

11157543980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11157543980 is an abundant number, since it is smaller than the sum of its proper divisors (14403375460).

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

11157543980 is a wasteful number, since it uses less digits than its factorization.

11157543980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50716129 (or 50716127 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 44.

The spelling of 11157543980 in words is "eleven billion, one hundred fifty-seven million, five hundred forty-three thousand, nine hundred eighty".