11157397880 has 16 divisors (see below), whose sum is σ = 25104145320. Its totient is φ = 4462959136.

The previous prime is 11157397837. The next prime is 11157397897. The reversal of 11157397880 is 8879375111.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139467434 + ... + 139467513.

Almost surely, 2^11157397880 is an apocalyptic number.

11157397880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11157397880 is an abundant number, since it is smaller than the sum of its proper divisors (13946747440).

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

11157397880 is a wasteful number, since it uses less digits than its factorization.

11157397880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278934958 (or 278934954 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 50.

The spelling of 11157397880 in words is "eleven billion, one hundred fifty-seven million, three hundred ninety-seven thousand, eight hundred eighty".