13610997685 has 4 divisors (see below), whose sum is σ = 16333197228. Its totient is φ = 10888798144.

The previous prime is 13610997683. The next prime is 13610997731. The reversal of 13610997685 is 58679901631.

It is a happy number.

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 9460674756 + 4150322929 = 97266^2 + 64423^2 .

It is a cyclic number.

It is not a de Polignac number, because 13610997685 - 2¹ = 13610997683 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 (13610997683) 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, 1361099764 + ... + 1361099773.

It is an arithmetic number, because the mean of its divisors is an integer number (4083299307).

Almost surely, 2^13610997685 is an apocalyptic number.

It is an amenable number.

13610997685 is a deficient number, since it is larger than the sum of its proper divisors (2722199543).

13610997685 is an equidigital number, since it uses as much as digits as its factorization.

13610997685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722199542.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 13610997685 in words is "thirteen billion, six hundred ten million, nine hundred ninety-seven thousand, six hundred eighty-five".