13978813798481 has 8 divisors (see below), whose sum is σ = 15975832401024. Its totient is φ = 11981806496640.

The previous prime is 13978813798463. The next prime is 13978813798483. The reversal of 13978813798481 is 18489731887931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13978813798481 is a prime.

It is a super-2 number, since 2×13978813798481² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13978813798483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16001 + ... + 5287521.

It is an arithmetic number, because the mean of its divisors is an integer number (1996979050128).

Almost surely, 2^{13978813798481} is an apocalyptic number.

It is an amenable number.

13978813798481 is a deficient number, since it is larger than the sum of its proper divisors (1997018602543).

13978813798481 is an equidigital number, since it uses as much as digits as its factorization.

13978813798481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5650351.

The product of its digits is 585252864, while the sum is 77.

The spelling of 13978813798481 in words is "thirteen trillion, nine hundred seventy-eight billion, eight hundred thirteen million, seven hundred ninety-eight thousand, four hundred eighty-one".