2564617906 has 16 divisors (see below), whose sum is σ = 3865603680. Its totient is φ = 1276093440.

The previous prime is 2564617903. The next prime is 2564617973. The reversal of 2564617906 is 6097164652.

It is not an unprimeable number, because it can be changed into a prime (2564617903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 785305 + ... + 788563.

It is an arithmetic number, because the mean of its divisors is an integer number (241600230).

Almost surely, 2^2564617906 is an apocalyptic number.

2564617906 is a deficient number, since it is larger than the sum of its proper divisors (1300985774).

2564617906 is a wasteful number, since it uses less digits than its factorization.

2564617906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5049.

The product of its (nonzero) digits is 544320, while the sum is 46.

The square root of 2564617906 is about 50642.0566920420. The cubic root of 2564617906 is about 1368.8028161795.

The spelling of 2564617906 in words is "two billion, five hundred sixty-four million, six hundred seventeen thousand, nine hundred six".