11657780808 has 32 divisors (see below), whose sum is σ = 29147104800. Its totient is φ = 3885573248.

The previous prime is 11657780807. The next prime is 11657780863. The reversal of 11657780808 is 80808775611.

It is not an unprimeable number, because it can be changed into a prime (11657780801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477523 + ... + 501341.

It is an arithmetic number, because the mean of its divisors is an integer number (910847025).

Almost surely, 2^11657780808 is an apocalyptic number.

It is an amenable number.

11657780808 is an abundant number, since it is smaller than the sum of its proper divisors (17489323992).

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

11657780808 is a wasteful number, since it uses less digits than its factorization.

11657780808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44221 (or 44217 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 51.

The spelling of 11657780808 in words is "eleven billion, six hundred fifty-seven million, seven hundred eighty thousand, eight hundred eight".