25391082816 has 84 divisors (see below), whose sum is σ = 79395242784. Its totient is φ = 7694265600.

The previous prime is 25391082803. The next prime is 25391082833. The reversal of 25391082816 is 61828019352.

25391082816 is a `hidden beast` number, since 2 + 539 + 108 + 2 + 8 + 1 + 6 = 666.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 1997380 + ... + 2010051.

Almost surely, 2^25391082816 is an apocalyptic number.

It is an amenable number.

25391082816 is an abundant number, since it is smaller than the sum of its proper divisors (54004159968).

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

25391082816 is a wasteful number, since it uses less digits than its factorization.

25391082816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007460 (or 4007447 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 25391082816 in words is "twenty-five billion, three hundred ninety-one million, eighty-two thousand, eight hundred sixteen".