13091991953600 has 504 divisors, whose sum is σ = 38367379643040. Its totient is φ = 4302011105280.

The previous prime is 13091991953503. The next prime is 13091991953627. The reversal of 13091991953600 is 635919919031.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 28647684572 + ... + 28647685028.

It is an arithmetic number, because the mean of its divisors is an integer number (76125753260).

Almost surely, 2^{13091991953600} is an apocalyptic number.

13091991953600 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 13091991953600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19183689821520).

13091991953600 is an abundant number, since it is smaller than the sum of its proper divisors (25275387689440).

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

13091991953600 is an equidigital number, since it uses as much as digits as its factorization.

13091991953600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165 (or 693 counting only the distinct ones).

The product of its (nonzero) digits is 1771470, while the sum is 56.

The spelling of 13091991953600 in words is "thirteen trillion, ninety-one billion, nine hundred ninety-one million, nine hundred fifty-three thousand, six hundred".