2561905126 has 8 divisors (see below), whose sum is σ = 4192208424. Its totient is φ = 1164502320.

The previous prime is 2561905111. The next prime is 2561905169. The reversal of 2561905126 is 6215091652.

2561905126 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58225095 + ... + 58225138.

It is an arithmetic number, because the mean of its divisors is an integer number (524026053).

Almost surely, 2^2561905126 is an apocalyptic number.

2561905126 is a deficient number, since it is larger than the sum of its proper divisors (1630303298).

2561905126 is a wasteful number, since it uses less digits than its factorization.

2561905126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116450246.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 2561905126 is about 50615.2657406834. The cubic root of 2561905126 is about 1368.3200189923.

Adding to 2561905126 its reverse (6215091652), we get a palindrome (8776996778).

The spelling of 2561905126 in words is "two billion, five hundred sixty-one million, nine hundred five thousand, one hundred twenty-six".