2564778527 has 4 divisors (see below), whose sum is σ = 2576280000. Its totient is φ = 2553277056.

The previous prime is 2564778509. The next prime is 2564778539. The reversal of 2564778527 is 7258774652.

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

It is a cyclic number.

It is not a de Polignac number, because 2564778527 - 2¹⁴ = 2564762143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564778427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5750402 + ... + 5750847.

It is an arithmetic number, because the mean of its divisors is an integer number (644070000).

Almost surely, 2^2564778527 is an apocalyptic number.

2564778527 is a deficient number, since it is larger than the sum of its proper divisors (11501473).

2564778527 is a wasteful number, since it uses less digits than its factorization.

2564778527 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11501472.

The product of its digits is 6585600, while the sum is 53.

The square root of 2564778527 is about 50643.6425131526. The cubic root of 2564778527 is about 1368.8313914417.

The spelling of 2564778527 in words is "two billion, five hundred sixty-four million, seven hundred seventy-eight thousand, five hundred twenty-seven".