1659146399 has 6 divisors (see below), whose sum is σ = 1762484544. Its totient is φ = 1561549280.

The previous prime is 1659146369. The next prime is 1659146407. The reversal of 1659146399 is 9936419561.

It is a happy number.

It is not a de Polignac number, because 1659146399 - 2²⁸ = 1390710943 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1659146399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1659146369) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2870207 + ... + 2870784.

It is an arithmetic number, because the mean of its divisors is an integer number (293747424).

Almost surely, 2^1659146399 is an apocalyptic number.

1659146399 is a deficient number, since it is larger than the sum of its proper divisors (103338145).

1659146399 is an equidigital number, since it uses as much as digits as its factorization.

1659146399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5741025 (or 5741008 counting only the distinct ones).

The product of its digits is 1574640, while the sum is 53.

The square root of 1659146399 is about 40732.6208216461. The cubic root of 1659146399 is about 1183.8451599981.

The spelling of 1659146399 in words is "one billion, six hundred fifty-nine million, one hundred forty-six thousand, three hundred ninety-nine".