25558630512 has 80 divisors (see below), whose sum is σ = 69818864640. Its totient is φ = 8043609600.

The previous prime is 25558630507. The next prime is 25558630549. The reversal of 25558630512 is 21503685552.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 148462 + ... + 270477.

It is an arithmetic number, because the mean of its divisors is an integer number (872735808).

Almost surely, 2^25558630512 is an apocalyptic number.

It is an amenable number.

25558630512 is an abundant number, since it is smaller than the sum of its proper divisors (44260234128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25558630512 is a wasteful number, since it uses less digits than its factorization.

25558630512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419022 (or 419016 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 25558630512 in words is "twenty-five billion, five hundred fifty-eight million, six hundred thirty thousand, five hundred twelve".