2564208745 has 16 divisors (see below), whose sum is σ = 3701715840. Its totient is φ = 1665771264.

The previous prime is 2564208683. The next prime is 2564208763. The reversal of 2564208745 is 5478024652.

It is a happy number.

2564208745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2564208745 - 2²¹ = 2562111593 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1927312 + ... + 1928641.

It is an arithmetic number, because the mean of its divisors is an integer number (231357240).

Almost surely, 2^2564208745 is an apocalyptic number.

It is an amenable number.

2564208745 is a deficient number, since it is larger than the sum of its proper divisors (1137507095).

2564208745 is a wasteful number, since it uses less digits than its factorization.

2564208745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3855984.

The product of its (nonzero) digits is 537600, while the sum is 43.

The square root of 2564208745 is about 50638.0167956842. The cubic root of 2564208745 is about 1368.7300190435.

The spelling of 2564208745 in words is "two billion, five hundred sixty-four million, two hundred eight thousand, seven hundred forty-five".