2578784680 has 16 divisors (see below), whose sum is σ = 5802265620. Its totient is φ = 1031513856.

The previous prime is 2578784651. The next prime is 2578784707. The reversal of 2578784680 is 864878752.

It can be written as a sum of positive squares in 2 ways, for example, as 2571909796 + 6874884 = 50714^2 + 2622^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32234769 + ... + 32234848.

Almost surely, 2^2578784680 is an apocalyptic number.

2578784680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2578784680 is an abundant number, since it is smaller than the sum of its proper divisors (3223480940).

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

2578784680 is a wasteful number, since it uses less digits than its factorization.

2578784680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64469628 (or 64469624 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 55.

The square root of 2578784680 is about 50781.7356930619. The cubic root of 2578784680 is about 1371.3185806092.

The spelling of 2578784680 in words is "two billion, five hundred seventy-eight million, seven hundred eighty-four thousand, six hundred eighty".