165373641 has 12 divisors (see below), whose sum is σ = 240256068. Its totient is φ = 109610784.

The previous prime is 165373639. The next prime is 165373643. The reversal of 165373641 is 146373561.

165373641 is a `hidden beast` number, since 1 + 6 + 5 + 3 + 7 + 3 + 641 = 666.

It is an interprime number because it is at equal distance from previous prime (165373639) and next prime (165373643).

It can be written as a sum of positive squares in 2 ways, for example, as 91757241 + 73616400 = 9579^2 + 8580^2 .

It is not a de Polignac number, because 165373641 - 2¹ = 165373639 is a prime.

It is a super-2 number, since 2×165373641² = 54696882275193762, which contains 22 as substring.

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 165373596 and 165373605.

It is not an unprimeable number, because it can be changed into a prime (165373643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51550 + ... + 54663.

It is an arithmetic number, because the mean of its divisors is an integer number (20021339).

Almost surely, 2^165373641 is an apocalyptic number.

It is an amenable number.

165373641 is a deficient number, since it is larger than the sum of its proper divisors (74882427).

165373641 is a wasteful number, since it uses less digits than its factorization.

165373641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106392 (or 106389 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 165373641 is about 12859.7683105101. The cubic root of 165373641 is about 548.8943529479.

The spelling of 165373641 in words is "one hundred sixty-five million, three hundred seventy-three thousand, six hundred forty-one".