64068044225 has 24 divisors (see below), whose sum is σ = 81405732408. Its totient is φ = 49989772800.

The previous prime is 64068044207. The next prime is 64068044237. The reversal of 64068044225 is 52244086046.

It can be written as a sum of positive squares in 12 ways, for example, as 59930467249 + 4137576976 = 244807^2 + 64324^2 .

It is a de Polignac number, because none of the positive numbers 2^k-64068044225 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4705127 + ... + 4718723.

It is an arithmetic number, because the mean of its divisors is an integer number (3391905517).

Almost surely, 2^64068044225 is an apocalyptic number.

It is an amenable number.

64068044225 is a deficient number, since it is larger than the sum of its proper divisors (17337688183).

64068044225 is a wasteful number, since it uses less digits than its factorization.

64068044225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18245 (or 18240 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 41.

The spelling of 64068044225 in words is "sixty-four billion, sixty-eight million, forty-four thousand, two hundred twenty-five".