1609666016365 has 32 divisors (see below), whose sum is σ = 2110246888320. Its totient is φ = 1168974124800.

The previous prime is 1609666016351. The next prime is 1609666016459. The reversal of 1609666016365 is 5636106669061.

It is not a de Polignac number, because 1609666016365 - 2⁷ = 1609666016237 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 159509970 + ... + 159520060.

It is an arithmetic number, because the mean of its divisors is an integer number (65945215260).

Almost surely, 2^{1609666016365} is an apocalyptic number.

It is an amenable number.

1609666016365 is a deficient number, since it is larger than the sum of its proper divisors (500580871955).

1609666016365 is a wasteful number, since it uses less digits than its factorization.

1609666016365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14013.

The product of its (nonzero) digits is 6298560, while the sum is 55.

The spelling of 1609666016365 in words is "one trillion, six hundred nine billion, six hundred sixty-six million, sixteen thousand, three hundred sixty-five".