11719031856 has 40 divisors (see below), whose sum is σ = 34599047424. Its totient is φ = 3348294720.

The previous prime is 11719031837. The next prime is 11719031887. The reversal of 11719031856 is 65813091711.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 17438700 + ... + 17439371.

Almost surely, 2^11719031856 is an apocalyptic number.

11719031856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11719031856 is an abundant number, since it is smaller than the sum of its proper divisors (22880015568).

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

11719031856 is a wasteful number, since it uses less digits than its factorization.

11719031856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34878089 (or 34878083 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 42.

The spelling of 11719031856 in words is "eleven billion, seven hundred nineteen million, thirty-one thousand, eight hundred fifty-six".