2255755640 has 32 divisors (see below), whose sum is σ = 5077237680. Its totient is φ = 901984512.

The previous prime is 2255755627. The next prime is 2255755643. The reversal of 2255755640 is 465575522.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2255755643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129107 + ... + 145533.

Almost surely, 2^2255755640 is an apocalyptic number.

2255755640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2255755640 is an abundant number, since it is smaller than the sum of its proper divisors (2821482040).

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

2255755640 is a wasteful number, since it uses less digits than its factorization.

2255755640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19871 (or 19867 counting only the distinct ones).

The product of its (nonzero) digits is 420000, while the sum is 41.

The square root of 2255755640 is about 47494.7959254485. The cubic root of 2255755640 is about 1311.4870823097.

The spelling of 2255755640 in words is "two billion, two hundred fifty-five million, seven hundred fifty-five thousand, six hundred forty".