13663404265 has 24 divisors (see below), whose sum is σ = 19902265920. Its totient is φ = 8961831648.

The previous prime is 13663404253. The next prime is 13663404299. The reversal of 13663404265 is 56240436631.

It is a happy number.

It is not a de Polignac number, because 13663404265 - 2¹³ = 13663396073 is a prime.

It is a super-2 number, since 2×13663404265² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1206735 + ... + 1218004.

It is an arithmetic number, because the mean of its divisors is an integer number (829261080).

Almost surely, 2^13663404265 is an apocalyptic number.

It is an amenable number.

13663404265 is a deficient number, since it is larger than the sum of its proper divisors (6238861655).

13663404265 is a wasteful number, since it uses less digits than its factorization.

13663404265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424781 (or 2424774 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 40.

The spelling of 13663404265 in words is "thirteen billion, six hundred sixty-three million, four hundred four thousand, two hundred sixty-five".