64914995650 has 24 divisors (see below), whose sum is σ = 120785259204. Its totient is φ = 25956672000.

The previous prime is 64914995647. The next prime is 64914995659. The reversal of 64914995650 is 5659941946.

It can be written as a sum of positive squares in 6 ways, for example, as 42050833969 + 22864161681 = 205063^2 + 151209^2 .

It is not an unprimeable number, because it can be changed into a prime (64914995659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91707 + ... + 371806.

Almost surely, 2^64914995650 is an apocalyptic number.

64914995650 is a deficient number, since it is larger than the sum of its proper divisors (55870263554).

64914995650 is a wasteful number, since it uses less digits than its factorization.

64914995650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466326 (or 466321 counting only the distinct ones).

The product of its (nonzero) digits is 10497600, while the sum is 58.

The spelling of 64914995650 in words is "sixty-four billion, nine hundred fourteen million, nine hundred ninety-five thousand, six hundred fifty".