11997461888 has 16 divisors (see below), whose sum is σ = 23901193860. Its totient is φ = 5998730880.

The previous prime is 11997461881. The next prime is 11997461893. The reversal of 11997461888 is 88816479911.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 11997461888.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11997461881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 46864958 + ... + 46865213.

Almost surely, 2^11997461888 is an apocalyptic number.

It is an amenable number.

11997461888 is a deficient number, since it is larger than the sum of its proper divisors (11903731972).

11997461888 is an frugal number, since it uses more digits than its factorization.

11997461888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93730185 (or 93730173 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 62.

The spelling of 11997461888 in words is "eleven billion, nine hundred ninety-seven million, four hundred sixty-one thousand, eight hundred eighty-eight".