2578718025 has 120 divisors (see below), whose sum is σ = 5369031360. Its totient is φ = 1214040960.

The previous prime is 2578718017. The next prime is 2578718029. The reversal of 2578718025 is 5208178752.

2578718025 is a `hidden beast` number, since 2 + 578 + 71 + 8 + 0 + 2 + 5 = 666.

It is not a de Polignac number, because 2578718025 - 2³ = 2578718017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (2578718029) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 603346 + ... + 607604.

It is an arithmetic number, because the mean of its divisors is an integer number (44741928).

Almost surely, 2^2578718025 is an apocalyptic number.

2578718025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2578718025 is an abundant number, since it is smaller than the sum of its proper divisors (2790313335).

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

2578718025 is a wasteful number, since it uses less digits than its factorization.

2578718025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4317 (or 4303 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The square root of 2578718025 is about 50781.0793997134. The cubic root of 2578718025 is about 1371.3067654793.

The spelling of 2578718025 in words is "two billion, five hundred seventy-eight million, seven hundred eighteen thousand, twenty-five".