15317949661 has 8 divisors (see below), whose sum is σ = 17526758144. Its totient is φ = 13114273680.

The previous prime is 15317949659. The next prime is 15317949677. The reversal of 15317949661 is 16694971351.

15317949661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 15317949661 - 2¹ = 15317949659 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15317949599 and 15317949608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15317949061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1276725 + ... + 1288666.

It is an arithmetic number, because the mean of its divisors is an integer number (2190844768).

Almost surely, 2^15317949661 is an apocalyptic number.

It is an amenable number.

15317949661 is a deficient number, since it is larger than the sum of its proper divisors (2208808483).

15317949661 is an equidigital number, since it uses as much as digits as its factorization.

15317949661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2566251.

The product of its digits is 1224720, while the sum is 52.

The spelling of 15317949661 in words is "fifteen billion, three hundred seventeen million, nine hundred forty-nine thousand, six hundred sixty-one".