64144245650 has 24 divisors (see below), whose sum is σ = 119315944020. Its totient is φ = 25656053760.

The previous prime is 64144245643. The next prime is 64144245673. The reversal of 64144245650 is 5654244146.

It can be written as a sum of positive squares in 6 ways, for example, as 17558635081 + 46585610569 = 132509^2 + 215837^2 .

It is a super-2 number, since 2×64144245650² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64144245598 and 64144245607.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1015802 + ... + 1077098.

Almost surely, 2^64144245650 is an apocalyptic number.

64144245650 is a deficient number, since it is larger than the sum of its proper divisors (55171698370).

64144245650 is a wasteful number, since it uses less digits than its factorization.

64144245650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82238 (or 82233 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 41.

Adding to 64144245650 its reverse (5654244146), we get a palindrome (69798489796).

The spelling of 64144245650 in words is "sixty-four billion, one hundred forty-four million, two hundred forty-five thousand, six hundred fifty".