2564560442 has 4 divisors (see below), whose sum is σ = 3846840666. Its totient is φ = 1282280220.

The previous prime is 2564560429. The next prime is 2564560447. The reversal of 2564560442 is 2440654652.

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., 2043853681 + 520706761 = 45209^2 + 22819^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2564560396 and 2564560405.

It is not an unprimeable number, because it can be changed into a prime (2564560447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641140109 + ... + 641140112.

Almost surely, 2^2564560442 is an apocalyptic number.

2564560442 is a deficient number, since it is larger than the sum of its proper divisors (1282280224).

2564560442 is a wasteful number, since it uses less digits than its factorization.

2564560442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282280223.

The product of its (nonzero) digits is 230400, while the sum is 38.

The square root of 2564560442 is about 50641.4893343393. The cubic root of 2564560442 is about 1368.7925927628.

The spelling of 2564560442 in words is "two billion, five hundred sixty-four million, five hundred sixty thousand, four hundred forty-two".