11781568040 has 32 divisors (see below), whose sum is σ = 28918395360. Its totient is φ = 4284206400.

The previous prime is 11781568031. The next prime is 11781568063. The reversal of 11781568040 is 4086518711.

It is a super-2 number, since 2×11781568040² (a number of 21 digits) contains 22 as substring.

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, 13387706 + ... + 13388585.

It is an arithmetic number, because the mean of its divisors is an integer number (903699855).

Almost surely, 2^11781568040 is an apocalyptic number.

11781568040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11781568040 is an abundant number, since it is smaller than the sum of its proper divisors (17136827320).

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

11781568040 is a wasteful number, since it uses less digits than its factorization.

11781568040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26776313 (or 26776309 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 41.

The spelling of 11781568040 in words is "eleven billion, seven hundred eighty-one million, five hundred sixty-eight thousand, forty".