25816184780 has 48 divisors (see below), whose sum is σ = 54393776640. Its totient is φ = 10292291328.

The previous prime is 25816184747. The next prime is 25816184783. The reversal of 25816184780 is 8748161852.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (25816184783) by changing a digit.

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, 11064494 + ... + 11066826.

It is an arithmetic number, because the mean of its divisors is an integer number (1133203680).

Almost surely, 2^25816184780 is an apocalyptic number.

25816184780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25816184780 is an abundant number, since it is smaller than the sum of its proper divisors (28577591860).

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

25816184780 is a wasteful number, since it uses less digits than its factorization.

25816184780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938 (or 3936 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 50.

The spelling of 25816184780 in words is "twenty-five billion, eight hundred sixteen million, one hundred eighty-four thousand, seven hundred eighty".