2555440664 has 16 divisors (see below), whose sum is σ = 5475944400. Its totient is φ = 1095188832.

The previous prime is 2555440651. The next prime is 2555440669. The reversal of 2555440664 is 4660445552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2555440669) by changing a digit.

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, 22816379 + ... + 22816490.

It is an arithmetic number, because the mean of its divisors is an integer number (342246525).

Almost surely, 2^2555440664 is an apocalyptic number.

It is an amenable number.

2555440664 is an abundant number, since it is smaller than the sum of its proper divisors (2920503736).

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

2555440664 is a wasteful number, since it uses less digits than its factorization.

2555440664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45632882 (or 45632878 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 41.

The square root of 2555440664 is about 50551.3665888470. The cubic root of 2555440664 is about 1367.1681544362.

The spelling of 2555440664 in words is "two billion, five hundred fifty-five million, four hundred forty thousand, six hundred sixty-four".