13618656602 has 4 divisors (see below), whose sum is σ = 20427984906. Its totient is φ = 6809328300.

The previous prime is 13618656559. The next prime is 13618656643. The reversal of 13618656602 is 20665681631.

It is a Cunningham number, because it is equal to 116699²+1.

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

It can be written as a sum of positive squares in only one way, i.e., 13618656601 + 1 = 116699^2 + 1^2 .

It is a super-4 number, since 4×13618656602⁴ (a number of 42 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3404664149 + ... + 3404664152.

Almost surely, 2^13618656602 is an apocalyptic number.

13618656602 is a deficient number, since it is larger than the sum of its proper divisors (6809328304).

13618656602 is an equidigital number, since it uses as much as digits as its factorization.

13618656602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6809328303.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 13618656602 in words is "thirteen billion, six hundred eighteen million, six hundred fifty-six thousand, six hundred two".