191318400000 has 1584 divisors, whose sum is σ = 861475987008. Its totient is φ = 39813120000.

The previous prime is 191318399981. The next prime is 191318400017. The reversal of 191318400000 is 4813191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2620799964 + ... + 2620800036.

Almost surely, 2^191318400000 is an apocalyptic number.

191318400000 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 191318400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (430737993504).

191318400000 is an abundant number, since it is smaller than the sum of its proper divisors (670157587008).

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

191318400000 is an equidigital number, since it uses as much as digits as its factorization.

191318400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 191318400000 in words is "one hundred ninety-one billion, three hundred eighteen million, four hundred thousand".