165102018049 has 4 divisors (see below), whose sum is σ = 169128896580. Its totient is φ = 161075139520.

The previous prime is 165102018041. The next prime is 165102018061. The reversal of 165102018049 is 940810201561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12736702449 + 152365315600 = 112857^2 + 390340^2 .

It is a cyclic number.

It is not a de Polignac number, because 165102018049 - 2³ = 165102018041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 165102017999 and 165102018017.

It is not an unprimeable number, because it can be changed into a prime (165102018041) 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 3 ways as a sum of consecutive naturals, for example, 2013439204 + ... + 2013439285.

It is an arithmetic number, because the mean of its divisors is an integer number (42282224145).

Almost surely, 2^165102018049 is an apocalyptic number.

It is an amenable number.

165102018049 is a deficient number, since it is larger than the sum of its proper divisors (4026878531).

165102018049 is an equidigital number, since it uses as much as digits as its factorization.

165102018049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4026878530.

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 165102018049 in words is "one hundred sixty-five billion, one hundred two million, eighteen thousand, forty-nine".