11813161980 has 24 divisors (see below), whose sum is σ = 33076853712. Its totient is φ = 3150176512.

The previous prime is 11813161961. The next prime is 11813161991. The reversal of 11813161980 is 8916131811.

11813161980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98442957 + ... + 98443076.

It is an arithmetic number, because the mean of its divisors is an integer number (1378202238).

Almost surely, 2^11813161980 is an apocalyptic number.

11813161980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11813161980 is an abundant number, since it is smaller than the sum of its proper divisors (21263691732).

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

11813161980 is a wasteful number, since it uses less digits than its factorization.

11813161980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196886045 (or 196886043 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 39.

The spelling of 11813161980 in words is "eleven billion, eight hundred thirteen million, one hundred sixty-one thousand, nine hundred eighty".