2801848561 has 4 divisors (see below), whose sum is σ = 2802336372. Its totient is φ = 2801360752.

The previous prime is 2801848537. The next prime is 2801848571. The reversal of 2801848561 is 1658481082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2524459536 + 277389025 = 50244^2 + 16655^2 .

It is a cyclic number.

It is not a de Polignac number, because 2801848561 - 2¹⁷ = 2801717489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2801848501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235186 + ... + 246811.

It is an arithmetic number, because the mean of its divisors is an integer number (700584093).

Almost surely, 2^2801848561 is an apocalyptic number.

It is an amenable number.

2801848561 is a deficient number, since it is larger than the sum of its proper divisors (487811).

2801848561 is an equidigital number, since it uses as much as digits as its factorization.

2801848561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487810.

The product of its (nonzero) digits is 122880, while the sum is 43.

The square root of 2801848561 is about 52932.4905988751. The cubic root of 2801848561 is about 1409.7698534547.

The spelling of 2801848561 in words is "two billion, eight hundred one million, eight hundred forty-eight thousand, five hundred sixty-one".