11775887772 has 48 divisors (see below), whose sum is σ = 30061487232. Its totient is φ = 3558153280.

The previous prime is 11775887759. The next prime is 11775887789. The reversal of 11775887772 is 27778857711.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82743 + ... + 174350.

It is an arithmetic number, because the mean of its divisors is an integer number (626280984).

Almost surely, 2^11775887772 is an apocalyptic number.

11775887772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11775887772 is an abundant number, since it is smaller than the sum of its proper divisors (18285599460).

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

11775887772 is a wasteful number, since it uses less digits than its factorization.

11775887772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257458 (or 257456 counting only the distinct ones).

The product of its digits is 10756480, while the sum is 60.

The spelling of 11775887772 in words is "eleven billion, seven hundred seventy-five million, eight hundred eighty-seven thousand, seven hundred seventy-two".