25651281963 has 16 divisors (see below), whose sum is σ = 37055753856. Its totient is φ = 15720620160.

The previous prime is 25651281937. The next prime is 25651281973. The reversal of 25651281963 is 36918215652.

It is not a de Polignac number, because 25651281963 - 2¹⁰ = 25651280939 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25651281973) 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 15 ways as a sum of consecutive naturals, for example, 5846253 + ... + 5850638.

It is an arithmetic number, because the mean of its divisors is an integer number (2315984616).

Almost surely, 2^25651281963 is an apocalyptic number.

25651281963 is a deficient number, since it is larger than the sum of its proper divisors (11404471893).

25651281963 is a wasteful number, since it uses less digits than its factorization.

25651281963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11696954.

The product of its digits is 777600, while the sum is 48.

The spelling of 25651281963 in words is "twenty-five billion, six hundred fifty-one million, two hundred eighty-one thousand, nine hundred sixty-three".