13656398867 has 4 divisors (see below), whose sum is σ = 13781687040. Its totient is φ = 13531110696.

The previous prime is 13656398863. The next prime is 13656398881. The reversal of 13656398867 is 76889365631.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13656398867 - 2² = 13656398863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13656398863) 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, 62643923 + ... + 62644140.

It is an arithmetic number, because the mean of its divisors is an integer number (3445421760).

Almost surely, 2^13656398867 is an apocalyptic number.

13656398867 is a deficient number, since it is larger than the sum of its proper divisors (125288173).

13656398867 is a wasteful number, since it uses less digits than its factorization.

13656398867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125288172.

The product of its digits is 39191040, while the sum is 62.

The spelling of 13656398867 in words is "thirteen billion, six hundred fifty-six million, three hundred ninety-eight thousand, eight hundred sixty-seven".