165798415297 has 4 divisors (see below), whose sum is σ = 165831800256. Its totient is φ = 165765030340.

The previous prime is 165798415259. The next prime is 165798415301. The reversal of 165798415297 is 792514897561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165798415297 is a prime.

It is a super-2 number, since 2×165798415297² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165796415297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16685029 + ... + 16694962.

It is an arithmetic number, because the mean of its divisors is an integer number (41457950064).

Almost surely, 2^165798415297 is an apocalyptic number.

It is an amenable number.

165798415297 is a deficient number, since it is larger than the sum of its proper divisors (33384959).

165798415297 is an equidigital number, since it uses as much as digits as its factorization.

165798415297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33384958.

The product of its digits is 38102400, while the sum is 64.

The spelling of 165798415297 in words is "one hundred sixty-five billion, seven hundred ninety-eight million, four hundred fifteen thousand, two hundred ninety-seven".