11691198400 has 84 divisors (see below), whose sum is σ = 32877351568. Its totient is φ = 4008407040.

The previous prime is 11691198373. The next prime is 11691198439. The reversal of 11691198400 is 489119611.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 510729 + ... + 533128.

Almost surely, 2^11691198400 is an apocalyptic number.

11691198400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11691198400 is an abundant number, since it is smaller than the sum of its proper divisors (21186153168).

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

11691198400 is a wasteful number, since it uses less digits than its factorization.

11691198400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043886 (or 1043871 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 40.

The spelling of 11691198400 in words is "eleven billion, six hundred ninety-one million, one hundred ninety-eight thousand, four hundred".