109738091988 has 144 divisors (see below), whose sum is σ = 337931776000. Its totient is φ = 29327448384.

The previous prime is 109738091873. The next prime is 109738092001. The reversal of 109738091988 is 889190837901.

109738091988 is a `hidden beast` number, since 1 + 0 + 97 + 380 + 91 + 9 + 88 = 666.

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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 233193 + ... + 523311.

Almost surely, 2^109738091988 is an apocalyptic number.

109738091988 is a gapful number since it is divisible by the number (18) 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 109738091988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168965888000).

109738091988 is an abundant number, since it is smaller than the sum of its proper divisors (228193684012).

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

109738091988 is a wasteful number, since it uses less digits than its factorization.

109738091988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290234 (or 290229 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 63.

The spelling of 109738091988 in words is "one hundred nine billion, seven hundred thirty-eight million, ninety-one thousand, nine hundred eighty-eight".