13993637991 has 16 divisors (see below), whose sum is σ = 18800879328. Its totient is φ = 9257792000.

The previous prime is 13993637981. The next prime is 13993637993. The reversal of 13993637991 is 19973639931.

13993637991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 13993637991 - 2⁶ = 13993637927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13993637993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2084941 + ... + 2091641.

It is an arithmetic number, because the mean of its divisors is an integer number (1175054958).

Almost surely, 2^13993637991 is an apocalyptic number.

13993637991 is a deficient number, since it is larger than the sum of its proper divisors (4807241337).

13993637991 is a wasteful number, since it uses less digits than its factorization.

13993637991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11922.

The product of its digits is 7440174, while the sum is 60.

The spelling of 13993637991 in words is "thirteen billion, nine hundred ninety-three million, six hundred thirty-seven thousand, nine hundred ninety-one".