1609149685 has 16 divisors (see below), whose sum is σ = 2268564480. Its totient is φ = 1080267840.

The previous prime is 1609149679. The next prime is 1609149697. The reversal of 1609149685 is 5869419061.

1609149685 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1609149685 - 2¹⁵ = 1609116917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1124565 + ... + 1125994.

It is an arithmetic number, because the mean of its divisors is an integer number (141785280).

Almost surely, 2^1609149685 is an apocalyptic number.

It is an amenable number.

1609149685 is a deficient number, since it is larger than the sum of its proper divisors (659414795).

1609149685 is a wasteful number, since it uses less digits than its factorization.

1609149685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2250588.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 1609149685 is about 40114.2080191047. The cubic root of 1609149685 is about 1171.8323456925.

The spelling of 1609149685 in words is "one billion, six hundred nine million, one hundred forty-nine thousand, six hundred eighty-five".