2564382749 has 2 divisors, whose sum is σ = 2564382750. Its totient is φ = 2564382748.

The previous prime is 2564382719. The next prime is 2564382859. The reversal of 2564382749 is 9472834652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1966922500 + 597460249 = 44350^2 + 24443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2564382749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2564382697 and 2564382706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564382719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282191374 + 1282191375.

It is an arithmetic number, because the mean of its divisors is an integer number (1282191375).

Almost surely, 2^2564382749 is an apocalyptic number.

It is an amenable number.

2564382749 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564382749 is an equidigital number, since it uses as much as digits as its factorization.

2564382749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 50.

The square root of 2564382749 is about 50639.7348827973. The cubic root of 2564382749 is about 1368.7609784459.

The spelling of 2564382749 in words is "two billion, five hundred sixty-four million, three hundred eighty-two thousand, seven hundred forty-nine".