13617525427 has 4 divisors (see below), whose sum is σ = 14855482296. Its totient is φ = 12379568560.

The previous prime is 13617525413. The next prime is 13617525431. The reversal of 13617525427 is 72452571631.

It is a happy number.

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 13617525427 - 2¹⁵ = 13617492659 is a prime.

It is a super-4 number, since 4×13617525427⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13617525127) 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, 618978418 + ... + 618978439.

It is an arithmetic number, because the mean of its divisors is an integer number (3713870574).

Almost surely, 2^13617525427 is an apocalyptic number.

13617525427 is a deficient number, since it is larger than the sum of its proper divisors (1237956869).

13617525427 is a wasteful number, since it uses less digits than its factorization.

13617525427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1237956868.

The product of its digits is 352800, while the sum is 43.

The spelling of 13617525427 in words is "thirteen billion, six hundred seventeen million, five hundred twenty-five thousand, four hundred twenty-seven".