25853947616 has 72 divisors (see below), whose sum is σ = 62693171856. Its totient is φ = 10428472320.

The previous prime is 25853947601. The next prime is 25853947619. The reversal of 25853947616 is 61674935852.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25853947619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 458300 + ... + 511611.

It is an arithmetic number, because the mean of its divisors is an integer number (870738498).

Almost surely, 2^25853947616 is an apocalyptic number.

It is an amenable number.

25853947616 is an abundant number, since it is smaller than the sum of its proper divisors (36839224240).

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

25853947616 is a wasteful number, since it uses less digits than its factorization.

25853947616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969952 (or 969937 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 56.

The spelling of 25853947616 in words is "twenty-five billion, eight hundred fifty-three million, nine hundred forty-seven thousand, six hundred sixteen".