13977978851 has 8 divisors (see below), whose sum is σ = 14016851184. Its totient is φ = 13939153920.

The previous prime is 13977978841. The next prime is 13977978893. The reversal of 13977978851 is 15887977931.

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-13977978851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13977978841) 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, 625511 + ... + 647471.

It is an arithmetic number, because the mean of its divisors is an integer number (1752106398).

Almost surely, 2^13977978851 is an apocalyptic number.

13977978851 is a deficient number, since it is larger than the sum of its proper divisors (38872333).

13977978851 is a wasteful number, since it uses less digits than its factorization.

13977978851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23701.

The product of its digits is 26671680, while the sum is 65.

The spelling of 13977978851 in words is "thirteen billion, nine hundred seventy-seven million, nine hundred seventy-eight thousand, eight hundred fifty-one".