1609509212015 has 8 divisors (see below), whose sum is σ = 1933089090048. Its totient is φ = 1286488679200.

The previous prime is 1609509212009. The next prime is 1609509212033. The reversal of 1609509212015 is 5102129059061.

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

It is not a de Polignac number, because 1609509212015 - 2⁸ = 1609509211759 is a prime.

It is a super-2 number, since 2×1609509212015² (a number of 25 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 139829972 + ... + 139841481.

It is an arithmetic number, because the mean of its divisors is an integer number (241636136256).

Almost surely, 2^{1609509212015} is an apocalyptic number.

1609509212015 is a deficient number, since it is larger than the sum of its proper divisors (323579878033).

1609509212015 is a wasteful number, since it uses less digits than its factorization.

1609509212015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279672609.

The product of its (nonzero) digits is 48600, while the sum is 41.

The spelling of 1609509212015 in words is "one trillion, six hundred nine billion, five hundred nine million, two hundred twelve thousand, fifteen".