2578438825 has 12 divisors (see below), whose sum is σ = 3201012880. Its totient is φ = 2060332560.

The previous prime is 2578438823. The next prime is 2578438831. The reversal of 2578438825 is 5288348752.

It is not a de Polignac number, because 2578438825 - 2¹ = 2578438823 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2578438823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38559 + ... + 81508.

Almost surely, 2^2578438825 is an apocalyptic number.

2578438825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2578438825 is a deficient number, since it is larger than the sum of its proper divisors (622574055).

2578438825 is a wasteful number, since it uses less digits than its factorization.

2578438825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120936 (or 120931 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 52.

The square root of 2578438825 is about 50778.3302699094. The cubic root of 2578438825 is about 1371.2572728421.

The spelling of 2578438825 in words is "two billion, five hundred seventy-eight million, four hundred thirty-eight thousand, eight hundred twenty-five".