165025200545 has 8 divisors (see below), whose sum is σ = 198032510760. Its totient is φ = 132018647040.

The previous prime is 165025200541. The next prime is 165025200551. The reversal of 165025200545 is 545002520561.

It can be written as a sum of positive squares in 4 ways, for example, as 10971305536 + 154053895009 = 104744^2 + 392497^2 .

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

It is not a de Polignac number, because 165025200545 - 2² = 165025200541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165025200541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 561185 + ... + 803105.

It is an arithmetic number, because the mean of its divisors is an integer number (24754063845).

Almost surely, 2^165025200545 is an apocalyptic number.

It is an amenable number.

165025200545 is a deficient number, since it is larger than the sum of its proper divisors (33007310215).

165025200545 is a wasteful number, since it uses less digits than its factorization.

165025200545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378355.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 165025200545 in words is "one hundred sixty-five billion, twenty-five million, two hundred thousand, five hundred forty-five".