2561394410 has 16 divisors (see below), whose sum is σ = 4632364512. Its totient is φ = 1019701200.

The previous prime is 2561394383. The next prime is 2561394413. The reversal of 2561394410 is 144931652.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2561394413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 604856 + ... + 609075.

It is an arithmetic number, because the mean of its divisors is an integer number (289522782).

Almost surely, 2^2561394410 is an apocalyptic number.

2561394410 is a deficient number, since it is larger than the sum of its proper divisors (2070970102).

2561394410 is a wasteful number, since it uses less digits than its factorization.

2561394410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214149.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 2561394410 is about 50610.2204105060. The cubic root of 2561394410 is about 1368.2290880464.

The spelling of 2561394410 in words is "two billion, five hundred sixty-one million, three hundred ninety-four thousand, four hundred ten".