2555535640 has 32 divisors (see below), whose sum is σ = 6571378080. Its totient is φ = 876183552.

The previous prime is 2555535607. The next prime is 2555535733. The reversal of 2555535640 is 465355552.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2555535593 and 2555535602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4563177 + ... + 4563736.

It is an arithmetic number, because the mean of its divisors is an integer number (205355565).

Almost surely, 2^2555535640 is an apocalyptic number.

2555535640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2555535640 is an abundant number, since it is smaller than the sum of its proper divisors (4015842440).

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

2555535640 is a wasteful number, since it uses less digits than its factorization.

2555535640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126931 (or 9126927 counting only the distinct ones).

The product of its (nonzero) digits is 450000, while the sum is 40.

The square root of 2555535640 is about 50552.3059810332. The cubic root of 2555535640 is about 1367.1850917047.

The spelling of 2555535640 in words is "two billion, five hundred fifty-five million, five hundred thirty-five thousand, six hundred forty".