25530280025 has 24 divisors (see below), whose sum is σ = 33072883200. Its totient is φ = 19513197440.

The previous prime is 25530280021. The next prime is 25530280067. The reversal of 25530280025 is 52008203552.

It is not a de Polignac number, because 25530280025 - 2² = 25530280021 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25530279973 and 25530280000.

It is not an unprimeable number, because it can be changed into a prime (25530280021) 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, 470501 + ... + 521949.

It is an arithmetic number, because the mean of its divisors is an integer number (1378036800).

Almost surely, 2^25530280025 is an apocalyptic number.

25530280025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25530280025 is a deficient number, since it is larger than the sum of its proper divisors (7542603175).

25530280025 is a wasteful number, since it uses less digits than its factorization.

25530280025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52345 (or 52340 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 25530280025 its reverse (52008203552), we get a palindrome (77538483577).

The spelling of 25530280025 in words is "twenty-five billion, five hundred thirty million, two hundred eighty thousand, twenty-five".