2561572674 has 40 divisors (see below), whose sum is σ = 5837127120. Its totient is φ = 839382264.

The previous prime is 2561572667. The next prime is 2561572681. The reversal of 2561572674 is 4762751652.

2561572674 is a `hidden beast` number, since 2 + 5 + 6 + 1 + 572 + 6 + 74 = 666.

It is an interprime number because it is at equal distance from previous prime (2561572667) and next prime (2561572681).

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 124444 + ... + 143559.

It is an arithmetic number, because the mean of its divisors is an integer number (145928178).

Almost surely, 2^2561572674 is an apocalyptic number.

2561572674 is an abundant number, since it is smaller than the sum of its proper divisors (3275554446).

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

2561572674 is a wasteful number, since it uses less digits than its factorization.

2561572674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268076 (or 268067 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 2561572674 is about 50611.9815261169. The cubic root of 2561572674 is about 1368.2608286133.

It can be divided in two parts, 25615 and 72674, that added together give a palindrome (98289).

The spelling of 2561572674 in words is "two billion, five hundred sixty-one million, five hundred seventy-two thousand, six hundred seventy-four".