261763389374041 has 2 divisors, whose sum is σ = 261763389374042. Its totient is φ = 261763389374040.

The previous prime is 261763389374027. The next prime is 261763389374159. The reversal of 261763389374041 is 140473983367162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197755453128025 + 64007936246016 = 14062555^2 + 8000496^2 .

It is a cyclic number.

It is not a de Polignac number, because 261763389374041 - 2²³ = 261763380985433 is a prime.

It is not a weakly prime, because it can be changed into another prime (261763389374021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130881694687020 + 130881694687021.

It is an arithmetic number, because the mean of its divisors is an integer number (130881694687021).

Almost surely, 2^{261763389374041} is an apocalyptic number.

It is an amenable number.

261763389374041 is a deficient number, since it is larger than the sum of its proper divisors (1).

261763389374041 is an equidigital number, since it uses as much as digits as its factorization.

261763389374041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109734912, while the sum is 64.

The spelling of 261763389374041 in words is "two hundred sixty-one trillion, seven hundred sixty-three billion, three hundred eighty-nine million, three hundred seventy-four thousand, forty-one".