2561234705 has 16 divisors (see below), whose sum is σ = 3266676864. Its totient is φ = 1921109760.

The previous prime is 2561234681. The next prime is 2561234717. The reversal of 2561234705 is 5074321652.

It is not a de Polignac number, because 2561234705 - 2⁸ = 2561234449 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34931 + ... + 79640.

It is an arithmetic number, because the mean of its divisors is an integer number (204167304).

Almost surely, 2^2561234705 is an apocalyptic number.

It is an amenable number.

2561234705 is a deficient number, since it is larger than the sum of its proper divisors (705442159).

2561234705 is a wasteful number, since it uses less digits than its factorization.

2561234705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114856.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 2561234705 is about 50608.6425919526. The cubic root of 2561234705 is about 1368.2006507276.

The spelling of 2561234705 in words is "two billion, five hundred sixty-one million, two hundred thirty-four thousand, seven hundred five".