64650291250 has 40 divisors (see below), whose sum is σ = 121570884864. Its totient is φ = 25776810000.

The previous prime is 64650291247. The next prime is 64650291257. The reversal of 64650291250 is 5219205646.

It is not an unprimeable number, because it can be changed into a prime (64650291257) 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 19 ways as a sum of consecutive naturals, for example, 305599 + ... + 471901.

Almost surely, 2^64650291250 is an apocalyptic number.

64650291250 is a deficient number, since it is larger than the sum of its proper divisors (56920593614).

64650291250 is a wasteful number, since it uses less digits than its factorization.

64650291250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166636 (or 166621 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

Adding to 64650291250 its reverse (5219205646), we get a palindrome (69869496896).

The spelling of 64650291250 in words is "sixty-four billion, six hundred fifty million, two hundred ninety-one thousand, two hundred fifty".