64640050 has 12 divisors (see below), whose sum is σ = 120230586. Its totient is φ = 25856000.

The previous prime is 64640041. The next prime is 64640057. The reversal of 64640050 is 5004646.

It is a happy number.

64640050 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 48455521 + 16184529 = 6961^2 + 4023^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a junction number, because it is equal to n+sod(n) for n = 64639997 and 64640024.

It is not an unprimeable number, because it can be changed into a prime (64640057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 646351 + ... + 646450.

Almost surely, 2^64640050 is an apocalyptic number.

64640050 is a deficient number, since it is larger than the sum of its proper divisors (55590536).

64640050 is a wasteful number, since it uses less digits than its factorization.

64640050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292813 (or 1292808 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 64640050 is about 8039.9036063873. The cubic root of 64640050 is about 401.3290168948.

Adding to 64640050 its reverse (5004646), we get a palindrome (69644696).

The spelling of 64640050 in words is "sixty-four million, six hundred forty thousand, fifty".