13385668904 has 8 divisors (see below), whose sum is σ = 25098129210. Its totient is φ = 6692834448.

The previous prime is 13385668897. The next prime is 13385668909. The reversal of 13385668904 is 40986658331.

It can be written as a sum of positive squares in only one way, i.e., 9216384004 + 4169284900 = 96002^2 + 64570^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×13385668904² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13385668909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836604299 + ... + 836604314.

Almost surely, 2^13385668904 is an apocalyptic number.

It is an amenable number.

13385668904 is a deficient number, since it is larger than the sum of its proper divisors (11712460306).

13385668904 is a wasteful number, since it uses less digits than its factorization.

13385668904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673208619 (or 1673208615 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 53.

The spelling of 13385668904 in words is "thirteen billion, three hundred eighty-five million, six hundred sixty-eight thousand, nine hundred four".