6437845261 has 2 divisors, whose sum is σ = 6437845262. Its totient is φ = 6437845260.

The previous prime is 6437845247. The next prime is 6437845273. The reversal of 6437845261 is 1625487346.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6067475236 + 370370025 = 77894^2 + 19245^2 .

It is a cyclic number.

It is not a de Polignac number, because 6437845261 - 2¹³ = 6437837069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6437845231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3218922630 + 3218922631.

It is an arithmetic number, because the mean of its divisors is an integer number (3218922631).

Almost surely, 2^6437845261 is an apocalyptic number.

It is an amenable number.

6437845261 is a deficient number, since it is larger than the sum of its proper divisors (1).

6437845261 is an equidigital number, since it uses as much as digits as its factorization.

6437845261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 46.

The square root of 6437845261 is about 80236.1842375371. The cubic root of 6437845261 is about 1860.2879714649.

The spelling of 6437845261 in words is "six billion, four hundred thirty-seven million, eight hundred forty-five thousand, two hundred sixty-one".