165202070645257 has 8 divisors (see below), whose sum is σ = 165494365957256. Its totient is φ = 164909796037632.

The previous prime is 165202070645243. The next prime is 165202070645267. The reversal of 165202070645257 is 752546070202561.

It can be written as a sum of positive squares in 4 ways, for example, as 64628029192336 + 100574041452921 = 8039156^2 + 10028661^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 165202070645257 - 2³⁵ = 165167710906889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165202070645207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10840003 + ... + 21163879.

It is an arithmetic number, because the mean of its divisors is an integer number (20686795744657).

Almost surely, 2^{165202070645257} is an apocalyptic number.

It is an amenable number.

165202070645257 is a deficient number, since it is larger than the sum of its proper divisors (292295311999).

165202070645257 is a wasteful number, since it uses less digits than its factorization.

165202070645257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10352187.

The product of its (nonzero) digits is 7056000, while the sum is 52.

The spelling of 165202070645257 in words is "one hundred sixty-five trillion, two hundred two billion, seventy million, six hundred forty-five thousand, two hundred fifty-seven".