2565323064 has 48 divisors (see below), whose sum is σ = 7187333400. Its totient is φ = 825620544.

The previous prime is 2565323051. The next prime is 2565323077. The reversal of 2565323064 is 4603235652.

2565323064 is a `hidden beast` number, since 2 + 565 + 3 + 2 + 30 + 64 = 666.

It is an interprime number because it is at equal distance from previous prime (2565323051) and next prime (2565323077).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 in 11 ways as a sum of consecutive naturals, for example, 612214 + ... + 616389.

Almost surely, 2^2565323064 is an apocalyptic number.

2565323064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2565323064 is an abundant number, since it is smaller than the sum of its proper divisors (4622010336).

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

2565323064 is a wasteful number, since it uses less digits than its factorization.

2565323064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1228644 (or 1228637 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The square root of 2565323064 is about 50649.0183912778. The cubic root of 2565323064 is about 1368.9282583624.

The spelling of 2565323064 in words is "two billion, five hundred sixty-five million, three hundred twenty-three thousand, sixty-four".