25881761503928 has 64 divisors (see below), whose sum is σ = 54421020184320. Its totient is φ = 11439853689600.

The previous prime is 25881761503909. The next prime is 25881761503979. The reversal of 25881761503928 is 82930516718852.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27916550 + ... + 28828757.

It is an arithmetic number, because the mean of its divisors is an integer number (850328440380).

Almost surely, 2^{25881761503928} is an apocalyptic number.

It is an amenable number.

25881761503928 is an abundant number, since it is smaller than the sum of its proper divisors (28539258680392).

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

25881761503928 is a wasteful number, since it uses less digits than its factorization.

25881761503928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56745468 (or 56745464 counting only the distinct ones).

The product of its (nonzero) digits is 58060800, while the sum is 65.

The spelling of 25881761503928 in words is "twenty-five trillion, eight hundred eighty-one billion, seven hundred sixty-one million, five hundred three thousand, nine hundred twenty-eight".