2561245734 has 16 divisors (see below), whose sum is σ = 5192663472. Its totient is φ = 842053248.

The previous prime is 2561245669. The next prime is 2561245741. The reversal of 2561245734 is 4375421652.

It is a junction number, because it is equal to n+sod(n) for n = 2561245692 and 2561245701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2923359 + ... + 2924234.

It is an arithmetic number, because the mean of its divisors is an integer number (324541467).

Almost surely, 2^2561245734 is an apocalyptic number.

2561245734 is an abundant number, since it is smaller than the sum of its proper divisors (2631417738).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2561245734 is a wasteful number, since it uses less digits than its factorization.

2561245734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5847671.

The product of its digits is 201600, while the sum is 39.

The square root of 2561245734 is about 50608.7515554375. The cubic root of 2561245734 is about 1368.2026146064.

The spelling of 2561245734 in words is "two billion, five hundred sixty-one million, two hundred forty-five thousand, seven hundred thirty-four".