13931981758248 has 128 divisors (see below), whose sum is σ = 36039002630400. Its totient is φ = 4485085952000.

The previous prime is 13931981758243. The next prime is 13931981758283. The reversal of 13931981758248 is 84285718913931.

It is a happy number.

It is a Cunningham number, because it is equal to 3732557²-1.

It is not an unprimeable number, because it can be changed into a prime (13931981758243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 918201190 + ... + 918216362.

It is an arithmetic number, because the mean of its divisors is an integer number (281554708050).

Almost surely, 2^{13931981758248} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13931981758248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18019501315200).

13931981758248 is an abundant number, since it is smaller than the sum of its proper divisors (22107020872152).

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

13931981758248 is a wasteful number, since it uses less digits than its factorization.

13931981758248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24563 (or 24559 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 69.

The spelling of 13931981758248 in words is "thirteen trillion, nine hundred thirty-one billion, nine hundred eighty-one million, seven hundred fifty-eight thousand, two hundred forty-eight".