2566438700 has 54 divisors (see below), whose sum is σ = 6478436916. Its totient is φ = 879920160.

The previous prime is 2566438669. The next prime is 2566438709. The reversal of 2566438700 is 78346652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2566438709) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 256982 + ... + 266781.

It is an arithmetic number, because the mean of its divisors is an integer number (119971054).

Almost surely, 2^2566438700 is an apocalyptic number.

2566438700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2566438700 is an abundant number, since it is smaller than the sum of its proper divisors (3911998216).

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

2566438700 is a wasteful number, since it uses less digits than its factorization.

2566438700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523791 (or 523777 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 2566438700 is about 50660.0305961218. The cubic root of 2566438700 is about 1369.1266744773.

The spelling of 2566438700 in words is "two billion, five hundred sixty-six million, four hundred thirty-eight thousand, seven hundred".