25263891628 has 12 divisors (see below), whose sum is σ = 44213051232. Its totient is φ = 12631591280.

The previous prime is 25263891619. The next prime is 25263891629. The reversal of 25263891628 is 82619836252.

It is not an unprimeable number, because it can be changed into a prime (25263891629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133626 + ... + 261502.

It is an arithmetic number, because the mean of its divisors is an integer number (3684420936).

Almost surely, 2^25263891628 is an apocalyptic number.

It is an amenable number.

25263891628 is a deficient number, since it is larger than the sum of its proper divisors (18949159604).

25263891628 is a wasteful number, since it uses less digits than its factorization.

25263891628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177272 (or 177270 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 52.

The spelling of 25263891628 in words is "twenty-five billion, two hundred sixty-three million, eight hundred ninety-one thousand, six hundred twenty-eight".