25905493985536 has 189 divisors, whose sum is σ = 57119761832707. Its totient is φ = 11725955816960.

The previous prime is 25905493985513. The next prime is 25905493985551. The reversal of 25905493985536 is 63558939450952.

The square root of 25905493985536 is 5089744.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 108391188105 + ... + 108391188343.

Almost surely, 2^{25905493985536} is an apocalyptic number.

25905493985536 is the 5089744-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25905493985536

25905493985536 is an abundant number, since it is smaller than the sum of its proper divisors (31214267847171).

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

25905493985536 is an frugal number, since it uses more digits than its factorization.

25905493985536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 1574640000, while the sum is 73.

The spelling of 25905493985536 in words is "twenty-five trillion, nine hundred five billion, four hundred ninety-three million, nine hundred eighty-five thousand, five hundred thirty-six".