2781846461 has 2 divisors, whose sum is σ = 2781846462. Its totient is φ = 2781846460.

The previous prime is 2781846427. The next prime is 2781846479. The reversal of 2781846461 is 1646481872.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2006502436 + 775344025 = 44794^2 + 27845^2 .

It is a cyclic number.

It is not a de Polignac number, because 2781846461 - 2¹⁸ = 2781584317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2781842461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1390923230 + 1390923231.

It is an arithmetic number, because the mean of its divisors is an integer number (1390923231).

Almost surely, 2^2781846461 is an apocalyptic number.

It is an amenable number.

2781846461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2781846461 is an equidigital number, since it uses as much as digits as its factorization.

2781846461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 516096, while the sum is 47.

The square root of 2781846461 is about 52743.2124637853. The cubic root of 2781846461 is about 1406.4071060794.

The spelling of 2781846461 in words is "two billion, seven hundred eighty-one million, eight hundred forty-six thousand, four hundred sixty-one".