2566403580 has 96 divisors (see below), whose sum is σ = 7784884800. Its totient is φ = 631697664.

The previous prime is 2566403579. The next prime is 2566403611. The reversal of 2566403580 is 853046652.

2566403580 = 4916² + 4917² + ... + 5019².

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122086 + ... + 141554.

It is an arithmetic number, because the mean of its divisors is an integer number (81092550).

Almost surely, 2^2566403580 is an apocalyptic number.

2566403580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2566403580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3892442400).

2566403580 is an abundant number, since it is smaller than the sum of its proper divisors (5218481220).

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

2566403580 is a wasteful number, since it uses less digits than its factorization.

2566403580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19520 (or 19492 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 2566403580 is about 50659.6839705895. The cubic root of 2566403580 is about 1369.1204292540.

The spelling of 2566403580 in words is "two billion, five hundred sixty-six million, four hundred three thousand, five hundred eighty".