25305300025 has 24 divisors (see below), whose sum is σ = 31712874264. Its totient is φ = 20028864000.

The previous prime is 25305300011. The next prime is 25305300047. The reversal of 25305300025 is 52000350352.

It can be written as a sum of positive squares in 12 ways, for example, as 5988747769 + 19316552256 = 77387^2 + 138984^2 .

It is not a de Polignac number, because 25305300025 - 2¹¹ = 25305297977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4423467 + ... + 4429183.

It is an arithmetic number, because the mean of its divisors is an integer number (1321369761).

Almost surely, 2^25305300025 is an apocalyptic number.

25305300025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25305300025 is a deficient number, since it is larger than the sum of its proper divisors (6407574239).

25305300025 is a wasteful number, since it uses less digits than its factorization.

25305300025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7581 (or 7576 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 25.

Adding to 25305300025 its reverse (52000350352), we get a palindrome (77305650377).

The spelling of 25305300025 in words is "twenty-five billion, three hundred five million, three hundred thousand, twenty-five".