118991991600 has 240 divisors, whose sum is σ = 445814819200. Its totient is φ = 30061082880.

The previous prime is 118991991593. The next prime is 118991991637. The reversal of 118991991600 is 6199199811.

118991991600 is a `hidden beast` number, since 1 + 18 + 9 + 9 + 19 + 9 + 1 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84742 + ... + 495141.

Almost surely, 2^118991991600 is an apocalyptic number.

118991991600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 118991991600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222907409600).

118991991600 is an abundant number, since it is smaller than the sum of its proper divisors (326822827600).

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

118991991600 is a wasteful number, since it uses less digits than its factorization.

118991991600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579929 (or 579912 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 54.

The spelling of 118991991600 in words is "one hundred eighteen billion, nine hundred ninety-one million, nine hundred ninety-one thousand, six hundred".