25330420253506 has 4 divisors (see below), whose sum is σ = 37995630380262. Its totient is φ = 12665210126752.

The previous prime is 25330420253483. The next prime is 25330420253531. The reversal of 25330420253506 is 60535202403352.

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

It can be written as a sum of positive squares in only one way, i.e., 17392311227281 + 7938109026225 = 4170409^2 + 2817465^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6332605063375 + ... + 6332605063378.

Almost surely, 2^{25330420253506} is an apocalyptic number.

25330420253506 is a deficient number, since it is larger than the sum of its proper divisors (12665210126756).

25330420253506 is a wasteful number, since it uses less digits than its factorization.

25330420253506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12665210126755.

The product of its (nonzero) digits is 648000, while the sum is 40.

Adding to 25330420253506 its reverse (60535202403352), we get a palindrome (85865622656858).

The spelling of 25330420253506 in words is "twenty-five trillion, three hundred thirty billion, four hundred twenty million, two hundred fifty-three thousand, five hundred six".