2561246626 has 16 divisors (see below), whose sum is σ = 4055297760. Its totient is φ = 1213215588.

The previous prime is 2561246617. The next prime is 2561246651. The reversal of 2561246626 is 6266421652.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 79636 + ... + 107071.

It is an arithmetic number, because the mean of its divisors is an integer number (253456110).

Almost surely, 2^2561246626 is an apocalyptic number.

2561246626 is a deficient number, since it is larger than the sum of its proper divisors (1494051134).

2561246626 is an equidigital number, since it uses as much as digits as its factorization.

2561246626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186766 (or 186728 counting only the distinct ones).

The product of its digits is 207360, while the sum is 40.

The square root of 2561246626 is about 50608.7603681418. The cubic root of 2561246626 is about 1368.2027734401.

The spelling of 2561246626 in words is "two billion, five hundred sixty-one million, two hundred forty-six thousand, six hundred twenty-six".