15479307855617 has 4 divisors (see below), whose sum is σ = 15839291759280. Its totient is φ = 15119323951956.

The previous prime is 15479307855611. The next prime is 15479307855619. The reversal of 15479307855617 is 71655870397451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15479307855617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15479307855611) 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, 179991951767 + ... + 179991951852.

It is an arithmetic number, because the mean of its divisors is an integer number (3959822939820).

Almost surely, 2^{15479307855617} is an apocalyptic number.

It is an amenable number.

15479307855617 is a deficient number, since it is larger than the sum of its proper divisors (359983903663).

15479307855617 is an equidigital number, since it uses as much as digits as its factorization.

15479307855617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359983903662.

The product of its (nonzero) digits is 222264000, while the sum is 68.

The spelling of 15479307855617 in words is "fifteen trillion, four hundred seventy-nine billion, three hundred seven million, eight hundred fifty-five thousand, six hundred seventeen".