2655636440 has 16 divisors (see below), whose sum is σ = 5975182080. Its totient is φ = 1062254560.

The previous prime is 2655636439. The next prime is 2655636449. The reversal of 2655636440 is 446365562.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2655636449) 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, 33195416 + ... + 33195495.

It is an arithmetic number, because the mean of its divisors is an integer number (373448880).

Almost surely, 2^2655636440 is an apocalyptic number.

2655636440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2655636440 is an abundant number, since it is smaller than the sum of its proper divisors (3319545640).

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

2655636440 is a wasteful number, since it uses less digits than its factorization.

2655636440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66390922 (or 66390918 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 41.

The square root of 2655636440 is about 51532.8675701246. The cubic root of 2655636440 is about 1384.8079234214.

The spelling of 2655636440 in words is "two billion, six hundred fifty-five million, six hundred thirty-six thousand, four hundred forty".