25785728816 has 80 divisors (see below), whose sum is σ = 52565111808. Its totient is φ = 12241152000.

The previous prime is 25785728791. The next prime is 25785728851. The reversal of 25785728816 is 61882758752.

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, 4880096 + ... + 4885376.

Almost surely, 2^25785728816 is an apocalyptic number.

It is an amenable number.

25785728816 is an abundant number, since it is smaller than the sum of its proper divisors (26779382992).

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

25785728816 is a wasteful number, since it uses less digits than its factorization.

25785728816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5530 (or 5524 counting only the distinct ones).

The product of its digits is 15052800, while the sum is 59.

The spelling of 25785728816 in words is "twenty-five billion, seven hundred eighty-five million, seven hundred twenty-eight thousand, eight hundred sixteen".