1609340726815 has 4 divisors (see below), whose sum is σ = 1931208872184. Its totient is φ = 1287472581448.

The previous prime is 1609340726797. The next prime is 1609340726821. The reversal of 1609340726815 is 5186270439061.

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

It is a cyclic number.

It is not a de Polignac number, because 1609340726815 - 2⁷ = 1609340726687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160934072677 + ... + 160934072686.

It is an arithmetic number, because the mean of its divisors is an integer number (482802218046).

It is a 1-persistent number, because it is pandigital, but 2⋅1609340726815 = 3218681453630 is not.

Almost surely, 2^{1609340726815} is an apocalyptic number.

1609340726815 is a deficient number, since it is larger than the sum of its proper divisors (321868145369).

1609340726815 is an equidigital number, since it uses as much as digits as its factorization.

1609340726815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321868145368.

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 1609340726815 in words is "one trillion, six hundred nine billion, three hundred forty million, seven hundred twenty-six thousand, eight hundred fifteen".