11998333656 has 80 divisors (see below), whose sum is σ = 34514795040. Its totient is φ = 3891343680.

The previous prime is 11998333643. The next prime is 11998333657. The reversal of 11998333656 is 65633389911.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11998333657) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 226240 + ... + 274191.

It is an arithmetic number, because the mean of its divisors is an integer number (431434938).

Almost surely, 2^11998333656 is an apocalyptic number.

It is an amenable number.

11998333656 is an abundant number, since it is smaller than the sum of its proper divisors (22516461384).

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

11998333656 is a wasteful number, since it uses less digits than its factorization.

11998333656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500486 (or 500473 counting only the distinct ones).

The product of its digits is 3149280, while the sum is 54.

The spelling of 11998333656 in words is "eleven billion, nine hundred ninety-eight million, three hundred thirty-three thousand, six hundred fifty-six".