109391990400 has 2304 divisors, whose sum is σ = 532050768000. Its totient is φ = 21946982400.

The previous prime is 109391990399. The next prime is 109391990417. The reversal of 109391990400 is 4099193901.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 3772137586 + ... + 3772137614.

Almost surely, 2^109391990400 is an apocalyptic number.

109391990400 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 109391990400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (266025384000).

109391990400 is an abundant number, since it is smaller than the sum of its proper divisors (422658777600).

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

109391990400 is an equidigital number, since it uses as much as digits as its factorization.

109391990400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 45.

The spelling of 109391990400 in words is "one hundred nine billion, three hundred ninety-one million, nine hundred ninety thousand, four hundred".