118108195551990 has 192 divisors, whose sum is σ = 360363800264832. Its totient is φ = 26275153766400.

The previous prime is 118108195551961. The next prime is 118108195552003. The reversal of 118108195551990 is 99155591801811.

118108195551990 is a `hidden beast` number, since 1 + 1 + 8 + 10 + 8 + 19 + 5 + 5 + 519 + 90 = 666.

It is a super-2 number, since 2×118108195551990² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5443884 + ... + 16304976.

It is an arithmetic number, because the mean of its divisors is an integer number (1876894793046).

Almost surely, 2^{118108195551990} is an apocalyptic number.

118108195551990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 118108195551990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180181900132416).

118108195551990 is an abundant number, since it is smaller than the sum of its proper divisors (242255604712842).

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

118108195551990 is a wasteful number, since it uses less digits than its factorization.

118108195551990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10861575 (or 10861572 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 63.

The spelling of 118108195551990 in words is "one hundred eighteen trillion, one hundred eight billion, one hundred ninety-five million, five hundred fifty-one thousand, nine hundred ninety".