13967881538 has 8 divisors (see below), whose sum is σ = 22563500988. Its totient is φ = 6446714544.

The previous prime is 13967881537. The next prime is 13967881573. The reversal of 13967881538 is 83518876931.

It can be written as a sum of positive squares in 2 ways, for example, as 13948318609 + 19562929 = 118103^2 + 4423^2 .

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

It is not an unprimeable number, because it can be changed into a prime (13967881537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268613081 + ... + 268613132.

Almost surely, 2^13967881538 is an apocalyptic number.

13967881538 is a deficient number, since it is larger than the sum of its proper divisors (8595619450).

13967881538 is a wasteful number, since it uses less digits than its factorization.

13967881538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537226228.

The product of its digits is 8709120, while the sum is 59.

The spelling of 13967881538 in words is "thirteen billion, nine hundred sixty-seven million, eight hundred eighty-one thousand, five hundred thirty-eight".