13913579662261 has 4 divisors (see below), whose sum is σ = 13913813339692. Its totient is φ = 13913345984832.

The previous prime is 13913579662237. The next prime is 13913579662319. The reversal of 13913579662261 is 16226697531931.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4600059800625 + 9313519861636 = 2144775^2 + 3051806^2 .

It is a cyclic number.

It is not a de Polignac number, because 13913579662261 - 2²¹ = 13913577565109 is a prime.

It is a super-3 number, since 3×13913579662261³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13913579662261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13913579662861) 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, 116749380 + ... + 116868493.

It is an arithmetic number, because the mean of its divisors is an integer number (3478453334923).

Almost surely, 2^{13913579662261} is an apocalyptic number.

It is an amenable number.

13913579662261 is a deficient number, since it is larger than the sum of its proper divisors (233677431).

13913579662261 is an equidigital number, since it uses as much as digits as its factorization.

13913579662261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233677430.

The product of its digits is 22044960, while the sum is 61.

The spelling of 13913579662261 in words is "thirteen trillion, nine hundred thirteen billion, five hundred seventy-nine million, six hundred sixty-two thousand, two hundred sixty-one".