2705421773261 has 2 divisors, whose sum is σ = 2705421773262. Its totient is φ = 2705421773260.

The previous prime is 2705421773239. The next prime is 2705421773281. The reversal of 2705421773261 is 1623771245072.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1615212228100 + 1090209545161 = 1270910^2 + 1044131^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2705421773261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2705421773231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1352710886630 + 1352710886631.

It is an arithmetic number, because the mean of its divisors is an integer number (1352710886631).

Almost surely, 2^{2705421773261} is an apocalyptic number.

It is an amenable number.

2705421773261 is a deficient number, since it is larger than the sum of its proper divisors (1).

2705421773261 is an equidigital number, since it uses as much as digits as its factorization.

2705421773261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 47.

The spelling of 2705421773261 in words is "two trillion, seven hundred five billion, four hundred twenty-one million, seven hundred seventy-three thousand, two hundred sixty-one".