2564415678 has 24 divisors (see below), whose sum is σ = 5637477384. Its totient is φ = 777095440.

The previous prime is 2564415673. The next prime is 2564415691. The reversal of 2564415678 is 8765144652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564415671) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1765401 + ... + 1766852.

It is an arithmetic number, because the mean of its divisors is an integer number (234894891).

Almost surely, 2^2564415678 is an apocalyptic number.

2564415678 is an abundant number, since it is smaller than the sum of its proper divisors (3073061706).

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

2564415678 is a wasteful number, since it uses less digits than its factorization.

2564415678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3532280 (or 3532269 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 48.

The square root of 2564415678 is about 50640.0600118128. The cubic root of 2564415678 is about 1368.7668371316.

The spelling of 2564415678 in words is "two billion, five hundred sixty-four million, four hundred fifteen thousand, six hundred seventy-eight".