2561448677 has 2 divisors, whose sum is σ = 2561448678. Its totient is φ = 2561448676.

The previous prime is 2561448671. The next prime is 2561448683. The reversal of 2561448677 is 7768441652.

2561448677 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (2561448671) and next prime (2561448683).

It can be written as a sum of positive squares in only one way, i.e., 2559449281 + 1999396 = 50591^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 2561448677 - 2¹² = 2561444581 is a prime.

It is a super-2 number, since 2×2561448677² = 13122038649810100658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2561448671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1280724338 + 1280724339.

It is an arithmetic number, because the mean of its divisors is an integer number (1280724339).

Almost surely, 2^2561448677 is an apocalyptic number.

It is an amenable number.

2561448677 is a deficient number, since it is larger than the sum of its proper divisors (1).

2561448677 is an equidigital number, since it uses as much as digits as its factorization.

2561448677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2257920, while the sum is 50.

The square root of 2561448677 is about 50610.7565345550. The cubic root of 2561448677 is about 1368.2387506431.

The spelling of 2561448677 in words is "two billion, five hundred sixty-one million, four hundred forty-eight thousand, six hundred seventy-seven".