25375614721 has 4 divisors (see below), whose sum is σ = 25375934212. Its totient is φ = 25375295232.

The previous prime is 25375614707. The next prime is 25375614739. The reversal of 25375614721 is 12741657352.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11143124721 + 14232490000 = 105561^2 + 119300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25375614721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25375614821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61945 + ... + 233641.

It is an arithmetic number, because the mean of its divisors is an integer number (6343983553).

Almost surely, 2^25375614721 is an apocalyptic number.

It is an amenable number.

25375614721 is a deficient number, since it is larger than the sum of its proper divisors (319491).

25375614721 is a wasteful number, since it uses less digits than its factorization.

25375614721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319490.

The product of its digits is 352800, while the sum is 43.

The spelling of 25375614721 in words is "twenty-five billion, three hundred seventy-five million, six hundred fourteen thousand, seven hundred twenty-one".