11777778972 has 24 divisors (see below), whose sum is σ = 30534982800. Its totient is φ = 3925926288.

The previous prime is 11777778967. The next prime is 11777778979. The reversal of 11777778972 is 27987777711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11777778979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54526647 + ... + 54526862.

It is an arithmetic number, because the mean of its divisors is an integer number (1272290950).

Almost surely, 2^11777778972 is an apocalyptic number.

11777778972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11777778972 is an abundant number, since it is smaller than the sum of its proper divisors (18757203828).

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

11777778972 is a wasteful number, since it uses less digits than its factorization.

11777778972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109053522 (or 109053514 counting only the distinct ones).

The product of its digits is 16941456, while the sum is 63.

The spelling of 11777778972 in words is "eleven billion, seven hundred seventy-seven million, seven hundred seventy-eight thousand, nine hundred seventy-two".