50640165 has 24 divisors (see below), whose sum is σ = 87943128. Its totient is φ = 26956800.

The previous prime is 50640157. The next prime is 50640169. The reversal of 50640165 is 56104605.

It is a happy number.

50640165 is a `hidden beast` number, since 5 + 0 + 640 + 16 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5239521 + 45400644 = 2289^2 + 6738^2 .

It is not a de Polignac number, because 50640165 - 2³ = 50640157 is a prime.

It is a super-2 number, since 2×50640165² = 5128852622454450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50640169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41565 + ... + 42765.

It is an arithmetic number, because the mean of its divisors is an integer number (3664297).

Almost surely, 2^50640165 is an apocalyptic number.

It is an amenable number.

50640165 is a deficient number, since it is larger than the sum of its proper divisors (37302963).

50640165 is a wasteful number, since it uses less digits than its factorization.

50640165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149 (or 2146 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 50640165 is about 7116.1903431541. The cubic root of 50640165 is about 369.9687458382.

It can be divided in two parts, 50640 and 165, that added together give a palindrome (50805).

The spelling of 50640165 in words is "fifty million, six hundred forty thousand, one hundred sixty-five".