25805852164 has 27 divisors (see below), whose sum is σ = 46682033223. Its totient is φ = 12481883400.

The previous prime is 25805852129. The next prime is 25805852183. The reversal of 25805852164 is 46125850852.

The square root of 25805852164 is 160642.

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

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

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, 9958509 + ... + 9961099.

Almost surely, 2^25805852164 is an apocalyptic number.

25805852164 is the 160642-nd square number.

It is an amenable number.

25805852164 is a deficient number, since it is larger than the sum of its proper divisors (20876181059).

25805852164 is an frugal number, since it uses more digits than its factorization.

25805852164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5248 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 768000, while the sum is 46.

It can be divided in two parts, 25805 and 852164, that added together give a square (877969 = 937²).

The spelling of 25805852164 in words is "twenty-five billion, eight hundred five million, eight hundred fifty-two thousand, one hundred sixty-four".