2567578061 has 2 divisors, whose sum is σ = 2567578062. Its totient is φ = 2567578060.

The previous prime is 2567578049. The next prime is 2567578081. The reversal of 2567578061 is 1608757652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2542075561 + 25502500 = 50419^2 + 5050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2567578061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2567577997 and 2567578015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2567578001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1283789030 + 1283789031.

It is an arithmetic number, because the mean of its divisors is an integer number (1283789031).

Almost surely, 2^2567578061 is an apocalyptic number.

It is an amenable number.

2567578061 is a deficient number, since it is larger than the sum of its proper divisors (1).

2567578061 is an equidigital number, since it uses as much as digits as its factorization.

2567578061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705600, while the sum is 47.

The square root of 2567578061 is about 50671.2745152517. The cubic root of 2567578061 is about 1369.3292507493.

The spelling of 2567578061 in words is "two billion, five hundred sixty-seven million, five hundred seventy-eight thousand, sixty-one".