25264050521 has 4 divisors (see below), whose sum is σ = 25322397492. Its totient is φ = 25205703552.

The previous prime is 25264050503. The next prime is 25264050529. The reversal of 25264050521 is 12505046252.

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 4905041296 + 20359009225 = 70036^2 + 142685^2 .

It is a cyclic number.

It is not a de Polignac number, because 25264050521 - 2¹⁰ = 25264049497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25264050529) 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 3 ways as a sum of consecutive naturals, for example, 29172836 + ... + 29173701.

It is an arithmetic number, because the mean of its divisors is an integer number (6330599373).

Almost surely, 2^25264050521 is an apocalyptic number.

It is an amenable number.

25264050521 is a deficient number, since it is larger than the sum of its proper divisors (58346971).

25264050521 is an equidigital number, since it uses as much as digits as its factorization.

25264050521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58346970.

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

Adding to 25264050521 its reverse (12505046252), we get a palindrome (37769096773).

The spelling of 25264050521 in words is "twenty-five billion, two hundred sixty-four million, fifty thousand, five hundred twenty-one".