2578784625 has 24 divisors (see below), whose sum is σ = 4648691112. Its totient is φ = 1375351200.

The previous prime is 2578784617. The next prime is 2578784627. The reversal of 2578784625 is 5264878752.

2578784625 is a `hidden beast` number, since 2 + 5 + 7 + 8 + 7 + 8 + 4 + 625 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 807469056 + 1771315569 = 28416^2 + 42087^2 .

It is not a de Polignac number, because 2578784625 - 2³ = 2578784617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2578784627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1145002 + ... + 1147251.

It is an arithmetic number, because the mean of its divisors is an integer number (193695463).

Almost surely, 2^2578784625 is an apocalyptic number.

2578784625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2578784625 is a deficient number, since it is larger than the sum of its proper divisors (2069906487).

2578784625 is a wasteful number, since it uses less digits than its factorization.

2578784625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292274 (or 2292261 counting only the distinct ones).

The product of its digits is 7526400, while the sum is 54.

The square root of 2578784625 is about 50781.7351515286. The cubic root of 2578784625 is about 1371.3185708601.

The spelling of 2578784625 in words is "two billion, five hundred seventy-eight million, seven hundred eighty-four thousand, six hundred twenty-five".