64144261268 has 12 divisors (see below), whose sum is σ = 113409699732. Its totient is φ = 31741489920.

The previous prime is 64144261267. The next prime is 64144261333. The reversal of 64144261268 is 86216244146.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16278697744 + 47865563524 = 127588^2 + 218782^2 .

It is a super-2 number, since 2×64144261268² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64144261267) 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 3 ways as a sum of consecutive naturals, for example, 82659743 + ... + 82660518.

It is an arithmetic number, because the mean of its divisors is an integer number (9450808311).

Almost surely, 2^64144261268 is an apocalyptic number.

It is an amenable number.

64144261268 is a deficient number, since it is larger than the sum of its proper divisors (49265438464).

64144261268 is a wasteful number, since it uses less digits than its factorization.

64144261268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165320362 (or 165320360 counting only the distinct ones).

The product of its digits is 442368, while the sum is 44.

The spelling of 64144261268 in words is "sixty-four billion, one hundred forty-four million, two hundred sixty-one thousand, two hundred sixty-eight".