165101641 has 2 divisors, whose sum is σ = 165101642. Its totient is φ = 165101640.

The previous prime is 165101627. The next prime is 165101681. The reversal of 165101641 is 146101561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164583241 + 518400 = 12829^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 165101641 - 2¹⁷ = 164970569 is a prime.

It is not a weakly prime, because it can be changed into another prime (165101681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82550820 + 82550821.

It is an arithmetic number, because the mean of its divisors is an integer number (82550821).

Almost surely, 2^165101641 is an apocalyptic number.

It is an amenable number.

165101641 is a deficient number, since it is larger than the sum of its proper divisors (1).

165101641 is an equidigital number, since it uses as much as digits as its factorization.

165101641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 165101641 is about 12849.1883401248. The cubic root of 165101641 is about 548.5932545950.

The spelling of 165101641 in words is "one hundred sixty-five million, one hundred one thousand, six hundred forty-one".