13978753915 has 8 divisors (see below), whose sum is σ = 19170862560. Its totient is φ = 9585431232.

The previous prime is 13978753909. The next prime is 13978753963. The reversal of 13978753915 is 51935787931.

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

It is a cyclic number.

It is not a de Polignac number, because 13978753915 - 2⁷ = 13978753787 is a prime.

It is a super-2 number, since 2×13978753915² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13978753915.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199696450 + ... + 199696519.

It is an arithmetic number, because the mean of its divisors is an integer number (2396357820).

Almost surely, 2^13978753915 is an apocalyptic number.

13978753915 is a deficient number, since it is larger than the sum of its proper divisors (5192108645).

13978753915 is an equidigital number, since it uses as much as digits as its factorization.

13978753915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399392981.

The product of its digits is 7144200, while the sum is 58.

The spelling of 13978753915 in words is "thirteen billion, nine hundred seventy-eight million, seven hundred fifty-three thousand, nine hundred fifteen".