25839781420 has 48 divisors (see below), whose sum is σ = 54836673696. Its totient is φ = 10226880000.

The previous prime is 25839781417. The next prime is 25839781433. The reversal of 25839781420 is 2418793852.

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, 4059040 + ... + 4065400.

It is an arithmetic number, because the mean of its divisors is an integer number (1142430702).

Almost surely, 2^25839781420 is an apocalyptic number.

25839781420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25839781420 is an abundant number, since it is smaller than the sum of its proper divisors (28996892276).

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

25839781420 is a wasteful number, since it uses less digits than its factorization.

25839781420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8482 (or 8480 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 25839781420 in words is "twenty-five billion, eight hundred thirty-nine million, seven hundred eighty-one thousand, four hundred twenty".