2851205761 has 2 divisors, whose sum is σ = 2851205762. Its totient is φ = 2851205760.

The previous prime is 2851205737. The next prime is 2851205801. The reversal of 2851205761 is 1675021582.

2851205761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2679097600 + 172108161 = 51760^2 + 13119^2 .

It is a cyclic number.

It is not a de Polignac number, because 2851205761 - 2⁷ = 2851205633 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2851205761.

It is not a weakly prime, because it can be changed into another prime (2851205701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1425602880 + 1425602881.

It is an arithmetic number, because the mean of its divisors is an integer number (1425602881).

Almost surely, 2^2851205761 is an apocalyptic number.

It is an amenable number.

2851205761 is a deficient number, since it is larger than the sum of its proper divisors (1).

2851205761 is an equidigital number, since it uses as much as digits as its factorization.

2851205761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 33600, while the sum is 37.

The square root of 2851205761 is about 53396.6830524144. The cubic root of 2851205761 is about 1417.9998556076. Note that the first 3 decimals are identical.

The spelling of 2851205761 in words is "two billion, eight hundred fifty-one million, two hundred five thousand, seven hundred sixty-one".