13772617613 has 4 divisors (see below), whose sum is σ = 13774677180. Its totient is φ = 13770558048.

The previous prime is 13772617601. The next prime is 13772617627. The reversal of 13772617613 is 31671627731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31671627731 = 653 ⋅48501727.

It can be written as a sum of positive squares in 2 ways, for example, as 11850935044 + 1921682569 = 108862^2 + 43837^2 .

It is a cyclic number.

It is not a de Polignac number, because 13772617613 - 2¹⁶ = 13772552077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13772611613) 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, 1019720 + ... + 1033137.

It is an arithmetic number, because the mean of its divisors is an integer number (3443669295).

Almost surely, 2^13772617613 is an apocalyptic number.

It is an amenable number.

13772617613 is a deficient number, since it is larger than the sum of its proper divisors (2059567).

13772617613 is an equidigital number, since it uses as much as digits as its factorization.

13772617613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059566.

The product of its digits is 222264, while the sum is 44.

The spelling of 13772617613 in words is "thirteen billion, seven hundred seventy-two million, six hundred seventeen thousand, six hundred thirteen".