2541817261 has 2 divisors, whose sum is σ = 2541817262. Its totient is φ = 2541817260.

The previous prime is 2541817241. The next prime is 2541817309. The reversal of 2541817261 is 1627181452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2538245161 + 3572100 = 50381^2 + 1890^2 .

It is a cyclic number.

It is not a de Polignac number, because 2541817261 - 2²⁷ = 2407599533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2541817261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2541817241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1270908630 + 1270908631.

It is an arithmetic number, because the mean of its divisors is an integer number (1270908631).

Almost surely, 2^2541817261 is an apocalyptic number.

It is an amenable number.

2541817261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2541817261 is an equidigital number, since it uses as much as digits as its factorization.

2541817261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 2541817261 is about 50416.4384005852. The cubic root of 2541817261 is about 1364.7343042190.

The spelling of 2541817261 in words is "two billion, five hundred forty-one million, eight hundred seventeen thousand, two hundred sixty-one".