2564355674 has 4 divisors (see below), whose sum is σ = 3846533514. Its totient is φ = 1282177836.

The previous prime is 2564355649. The next prime is 2564355683. The reversal of 2564355674 is 4765534652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2098098025 + 466257649 = 45805^2 + 21593^2 .

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 as a sum of consecutive naturals, namely, 641088917 + ... + 641088920.

Almost surely, 2^2564355674 is an apocalyptic number.

2564355674 is a deficient number, since it is larger than the sum of its proper divisors (1282177840).

2564355674 is a wasteful number, since it uses less digits than its factorization.

2564355674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282177839.

The product of its digits is 3024000, while the sum is 47.

The square root of 2564355674 is about 50639.4675524931. The cubic root of 2564355674 is about 1368.7561612589.

The spelling of 2564355674 in words is "two billion, five hundred sixty-four million, three hundred fifty-five thousand, six hundred seventy-four".