2564254388 has 12 divisors (see below), whose sum is σ = 4582923072. Its totient is φ = 1254847800.

The previous prime is 2564254387. The next prime is 2564254397. The reversal of 2564254388 is 8834524652.

It is a happy number.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564254387) 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 3 ways as a sum of consecutive naturals, for example, 6819638 + ... + 6820013.

It is an arithmetic number, because the mean of its divisors is an integer number (381910256).

Almost surely, 2^2564254388 is an apocalyptic number.

It is an amenable number.

2564254388 is a deficient number, since it is larger than the sum of its proper divisors (2018668684).

2564254388 is a wasteful number, since it uses less digits than its factorization.

2564254388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13639702 (or 13639700 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 47.

The square root of 2564254388 is about 50638.4674728610. The cubic root of 2564254388 is about 1368.7381401417.

The spelling of 2564254388 in words is "two billion, five hundred sixty-four million, two hundred fifty-four thousand, three hundred eighty-eight".