13120360661 has 8 divisors (see below), whose sum is σ = 13258575264. Its totient is φ = 12982309200.

The previous prime is 13120360639. The next prime is 13120360697. The reversal of 13120360661 is 16606302131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13120360661 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 (13120363661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124406 + ... + 204248.

It is an arithmetic number, because the mean of its divisors is an integer number (1657321908).

Almost surely, 2^13120360661 is an apocalyptic number.

It is an amenable number.

13120360661 is a deficient number, since it is larger than the sum of its proper divisors (138214603).

13120360661 is a wasteful number, since it uses less digits than its factorization.

13120360661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81571.

The product of its (nonzero) digits is 3888, while the sum is 29.

Adding to 13120360661 its reverse (16606302131), we get a palindrome (29726662792).

The spelling of 13120360661 in words is "thirteen billion, one hundred twenty million, three hundred sixty thousand, six hundred sixty-one".