56610550261 has 2 divisors, whose sum is σ = 56610550262. Its totient is φ = 56610550260.

The previous prime is 56610550081. The next prime is 56610550303. The reversal of 56610550261 is 16205501665.

56610550261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31459762161 + 25150788100 = 177369^2 + 158590^2 .

It is a cyclic number.

It is not a de Polignac number, because 56610550261 - 2¹³ = 56610542069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56610550261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56610550861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28305275130 + 28305275131.

It is an arithmetic number, because the mean of its divisors is an integer number (28305275131).

Almost surely, 2^56610550261 is an apocalyptic number.

It is an amenable number.

56610550261 is a deficient number, since it is larger than the sum of its proper divisors (1).

56610550261 is an equidigital number, since it uses as much as digits as its factorization.

56610550261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 56610550261 in words is "fifty-six billion, six hundred ten million, five hundred fifty thousand, two hundred sixty-one".