2561126017 has 8 divisors (see below), whose sum is σ = 2590952616. Its totient is φ = 2531369472.

The previous prime is 2561125997. The next prime is 2561126063. The reversal of 2561126017 is 7106211652.

It can be written as a sum of positive squares in 4 ways, for example, as 148449856 + 2412676161 = 12184^2 + 49119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2561126017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2561126017.

It is not an unprimeable number, because it can be changed into a prime (2561126077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57903 + ... + 92059.

It is an arithmetic number, because the mean of its divisors is an integer number (323869077).

Almost surely, 2^2561126017 is an apocalyptic number.

It is an amenable number.

2561126017 is a deficient number, since it is larger than the sum of its proper divisors (29826599).

2561126017 is an equidigital number, since it uses as much as digits as its factorization.

2561126017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35027.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 2561126017 is about 50607.5687718744. The cubic root of 2561126017 is about 1368.1812968986.

Adding to 2561126017 its reverse (7106211652), we get a palindrome (9667337669).

The spelling of 2561126017 in words is "two billion, five hundred sixty-one million, one hundred twenty-six thousand, seventeen".