2567856440 has 16 divisors (see below), whose sum is σ = 5777677080. Its totient is φ = 1027142560.

The previous prime is 2567856397. The next prime is 2567856451. The reversal of 2567856440 is 446587652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32098166 + ... + 32098245.

Almost surely, 2^2567856440 is an apocalyptic number.

2567856440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2567856440 is an abundant number, since it is smaller than the sum of its proper divisors (3209820640).

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

2567856440 is a wasteful number, since it uses less digits than its factorization.

2567856440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64196422 (or 64196418 counting only the distinct ones).

The product of its (nonzero) digits is 1612800, while the sum is 47.

The square root of 2567856440 is about 50674.0213521682. The cubic root of 2567856440 is about 1369.3787369087.

The spelling of 2567856440 in words is "two billion, five hundred sixty-seven million, eight hundred fifty-six thousand, four hundred forty".