165870001297 has 32 divisors (see below), whose sum is σ = 224547289344. Its totient is φ = 119307006720.

The previous prime is 165870001291. The next prime is 165870001303. The reversal of 165870001297 is 792100078561.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (165870001291) and next prime (165870001303).

It is not a de Polignac number, because 165870001297 - 2³⁵ = 131510262929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165870001291) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 563608 + ... + 805849.

It is an arithmetic number, because the mean of its divisors is an integer number (7017102792).

Almost surely, 2^165870001297 is an apocalyptic number.

It is an amenable number.

165870001297 is a deficient number, since it is larger than the sum of its proper divisors (58677288047).

165870001297 is a wasteful number, since it uses less digits than its factorization.

165870001297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369510 (or 1369488 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 46.

The spelling of 165870001297 in words is "one hundred sixty-five billion, eight hundred seventy million, one thousand, two hundred ninety-seven".