2561593374 has 48 divisors (see below), whose sum is σ = 5835697920. Its totient is φ = 810895680.

The previous prime is 2561593351. The next prime is 2561593381. The reversal of 2561593374 is 4733951652.

2561593374 is a `hidden beast` number, since 2 + 56 + 1 + 593 + 3 + 7 + 4 = 666.

It is a super-2 number, since 2×2561593374² = 13123521227441407752, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8382 + ... + 72065.

It is an arithmetic number, because the mean of its divisors is an integer number (121577040).

Almost surely, 2^2561593374 is an apocalyptic number.

2561593374 is an abundant number, since it is smaller than the sum of its proper divisors (3274104546).

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

2561593374 is a wasteful number, since it uses less digits than its factorization.

2561593374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80545 (or 80542 counting only the distinct ones).

The product of its digits is 680400, while the sum is 45.

The square root of 2561593374 is about 50612.1860227357. The cubic root of 2561593374 is about 1368.2645142298.

The spelling of 2561593374 in words is "two billion, five hundred sixty-one million, five hundred ninety-three thousand, three hundred seventy-four".