2555901440 has 40 divisors (see below), whose sum is σ = 6128179200. Its totient is φ = 1022359552.

The previous prime is 2555901421. The next prime is 2555901463. The reversal of 2555901440 is 441095552.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 2555901440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 496640 + ... + 501759.

It is an arithmetic number, because the mean of its divisors is an integer number (153204480).

Almost surely, 2^2555901440 is an apocalyptic number.

2555901440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2555901440 is an abundant number, since it is smaller than the sum of its proper divisors (3572277760).

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

2555901440 is an frugal number, since it uses more digits than its factorization.

2555901440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998422 (or 998406 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 2555901440 is about 50555.9238863261. The cubic root of 2555901440 is about 1367.2503216626.

Adding to 2555901440 its reverse (441095552), we get a palindrome (2996996992).

The spelling of 2555901440 in words is "two billion, five hundred fifty-five million, nine hundred one thousand, four hundred forty".