2564971847 has 2 divisors, whose sum is σ = 2564971848. Its totient is φ = 2564971846.

The previous prime is 2564971811. The next prime is 2564971889. The reversal of 2564971847 is 7481794652.

2564971847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2564971847 - 2¹⁰ = 2564970823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564970847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282485923 + 1282485924.

It is an arithmetic number, because the mean of its divisors is an integer number (1282485924).

Almost surely, 2^2564971847 is an apocalyptic number.

2564971847 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564971847 is an equidigital number, since it uses as much as digits as its factorization.

2564971847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3386880, while the sum is 53.

The square root of 2564971847 is about 50645.5511076738. The cubic root of 2564971847 is about 1368.8657824341.

The spelling of 2564971847 in words is "two billion, five hundred sixty-four million, nine hundred seventy-one thousand, eight hundred forty-seven".