13978356499 has 8 divisors (see below), whose sum is σ = 14044649472. Its totient is φ = 13912096200.

The previous prime is 13978356493. The next prime is 13978356517. The reversal of 13978356499 is 99465387931.

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-13978356499 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13978356499.

It is not an unprimeable number, because it can be changed into a prime (13978356493) 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, 1458774 + ... + 1468324.

It is an arithmetic number, because the mean of its divisors is an integer number (1755581184).

Almost surely, 2^13978356499 is an apocalyptic number.

13978356499 is a deficient number, since it is larger than the sum of its proper divisors (66292973).

13978356499 is an equidigital number, since it uses as much as digits as its factorization.

13978356499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16337.

The product of its digits is 44089920, while the sum is 64.

The spelling of 13978356499 in words is "thirteen billion, nine hundred seventy-eight million, three hundred fifty-six thousand, four hundred ninety-nine".