13618656601 has 15 divisors (see below), whose sum is σ = 15116024693. Its totient is φ = 12260396940.

The previous prime is 13618656559. The next prime is 13618656643. The reversal of 13618656601 is 10665681631.

The square root of 13618656601 is 116699.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (13618656559) and next prime (13618656643).

It is not a de Polignac number, because 13618656601 - 2²¹ = 13616559449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13618656671) by changing a digit.

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 in 14 ways as a sum of consecutive naturals, for example, 132219916 + ... + 132220018.

Almost surely, 2^13618656601 is an apocalyptic number.

13618656601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

13618656601 is the 116699-th square number.

13618656601 is the 58350-th centered octagonal number.

It is an amenable number.

13618656601 is a deficient number, since it is larger than the sum of its proper divisors (1497368092).

13618656601 is an frugal number, since it uses more digits than its factorization.

13618656601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 13618656601 in words is "thirteen billion, six hundred eighteen million, six hundred fifty-six thousand, six hundred one".