13991497500240 has 1200 divisors, whose sum is σ = 57388441904640. Its totient is φ = 3136736378880.

The previous prime is 13991497500217. The next prime is 13991497500241. The reversal of 13991497500240 is 4200579419931.

13991497500240 is a `hidden beast` number, since 1 + 3 + 9 + 9 + 1 + 4 + 97 + 500 + 2 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13991497500241) by changing a digit.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 754696891 + ... + 754715429.

Almost surely, 2^{13991497500240} is an apocalyptic number.

13991497500240 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 13991497500240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28694220952320).

13991497500240 is an abundant number, since it is smaller than the sum of its proper divisors (43396944404400).

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

13991497500240 is a wasteful number, since it uses less digits than its factorization.

13991497500240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18642 (or 18610 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 13991497500240 in words is "thirteen trillion, nine hundred ninety-one billion, four hundred ninety-seven million, five hundred thousand, two hundred forty".