123432550261 has 2 divisors, whose sum is σ = 123432550262. Its totient is φ = 123432550260.

The previous prime is 123432550259. The next prime is 123432550277. The reversal of 123432550261 is 162055234321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104245036900 + 19187513361 = 322870^2 + 138519^2 .

It is a cyclic number.

It is not a de Polignac number, because 123432550261 - 2¹ = 123432550259 is a prime.

Together with 123432550259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123432550211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61716275130 + 61716275131.

It is an arithmetic number, because the mean of its divisors is an integer number (61716275131).

Almost surely, 2^123432550261 is an apocalyptic number.

It is an amenable number.

123432550261 is a deficient number, since it is larger than the sum of its proper divisors (1).

123432550261 is an equidigital number, since it uses as much as digits as its factorization.

123432550261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 123432550261 its reverse (162055234321), we get a palindrome (285487784582).

The spelling of 123432550261 in words is "one hundred twenty-three billion, four hundred thirty-two million, five hundred fifty thousand, two hundred sixty-one".