25855353616 has 45 divisors (see below), whose sum is σ = 51006835893. Its totient is φ = 12696452160.

The previous prime is 25855353583. The next prime is 25855353697. The reversal of 25855353616 is 61635355852.

The square root of 25855353616 is 160796.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 840768016 + 25014585600 = 28996^2 + 158160^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25855353616.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 39233895 + ... + 39234553.

Almost surely, 2^25855353616 is an apocalyptic number.

25855353616 is the 160796-th square number.

It is an amenable number.

25855353616 is a deficient number, since it is larger than the sum of its proper divisors (25151482277).

25855353616 is an frugal number, since it uses more digits than its factorization.

25855353616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448 (or 722 counting only the distinct ones).

The product of its digits is 3240000, while the sum is 49.

Multiplying 25855353616 by its sum of digits (49), we get a square (1266912327184 = 1125572²).

The spelling of 25855353616 in words is "twenty-five billion, eight hundred fifty-five million, three hundred fifty-three thousand, six hundred sixteen".