25305561041 has 4 divisors (see below), whose sum is σ = 25365669684. Its totient is φ = 25245452400.

The previous prime is 25305561031. The next prime is 25305561053. The reversal of 25305561041 is 14016550352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2055715600 + 23249845441 = 45340^2 + 152479^2 .

It is a cyclic number.

It is not a de Polignac number, because 25305561041 - 2¹⁴ = 25305544657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25305560989 and 25305561007.

It is not an unprimeable number, because it can be changed into a prime (25305561031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30053690 + ... + 30054531.

It is an arithmetic number, because the mean of its divisors is an integer number (6341417421).

Almost surely, 2^25305561041 is an apocalyptic number.

It is an amenable number.

25305561041 is a deficient number, since it is larger than the sum of its proper divisors (60108643).

25305561041 is an equidigital number, since it uses as much as digits as its factorization.

25305561041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60108642.

The product of its (nonzero) digits is 18000, while the sum is 32.

The spelling of 25305561041 in words is "twenty-five billion, three hundred five million, five hundred sixty-one thousand, forty-one".