2564446772 has 6 divisors (see below), whose sum is σ = 4487781858. Its totient is φ = 1282223384.

The previous prime is 2564446763. The next prime is 2564446783. The reversal of 2564446772 is 2776444652.

It can be written as a sum of positive squares in only one way, i.e., 2505402916 + 59043856 = 50054^2 + 7684^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320555843 + ... + 320555850.

It is an arithmetic number, because the mean of its divisors is an integer number (747963643).

Almost surely, 2^2564446772 is an apocalyptic number.

It is an amenable number.

2564446772 is a deficient number, since it is larger than the sum of its proper divisors (1923335086).

2564446772 is a wasteful number, since it uses less digits than its factorization.

2564446772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641111697 (or 641111695 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 47.

The square root of 2564446772 is about 50640.3670207869. The cubic root of 2564446772 is about 1368.7723692903.

The spelling of 2564446772 in words is "two billion, five hundred sixty-four million, four hundred forty-six thousand, seven hundred seventy-two".