2561272277 has 2 divisors, whose sum is σ = 2561272278. Its totient is φ = 2561272276.

The previous prime is 2561272271. The next prime is 2561272283. The reversal of 2561272277 is 7722721652.

It is a balanced prime because it is at equal distance from previous prime (2561272271) and next prime (2561272283).

It can be written as a sum of positive squares in only one way, i.e., 1916163076 + 645109201 = 43774^2 + 25399^2 .

It is a cyclic number.

It is not a de Polignac number, because 2561272277 - 2⁶ = 2561272213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2561272271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280636138 + 1280636139.

It is an arithmetic number, because the mean of its divisors is an integer number (1280636139).

Almost surely, 2^2561272277 is an apocalyptic number.

It is an amenable number.

2561272277 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561272277 is an equidigital number, since it uses as much as digits as its factorization.

2561272277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 164640, while the sum is 41.

The square root of 2561272277 is about 50609.0137920114. The cubic root of 2561272277 is about 1368.2073409623.

The spelling of 2561272277 in words is "two billion, five hundred sixty-one million, two hundred seventy-two thousand, two hundred seventy-seven".