11971190780 has 12 divisors (see below), whose sum is σ = 25139500680. Its totient is φ = 4788476304.

The previous prime is 11971190753. The next prime is 11971190821. The reversal of 11971190780 is 8709117911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299279750 + ... + 299279789.

It is an arithmetic number, because the mean of its divisors is an integer number (2094958390).

Almost surely, 2^11971190780 is an apocalyptic number.

11971190780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11971190780 is an abundant number, since it is smaller than the sum of its proper divisors (13168309900).

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

11971190780 is a wasteful number, since it uses less digits than its factorization.

11971190780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598559548 (or 598559546 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 44.

The spelling of 11971190780 in words is "eleven billion, nine hundred seventy-one million, one hundred ninety thousand, seven hundred eighty".