25311537216 has 189 divisors, whose sum is σ = 84485217999. Its totient is φ = 7224231168.

The previous prime is 25311537193. The next prime is 25311537221. The reversal of 25311537216 is 61273511352.

The square root of 25311537216 is 159096.

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

25311537216 is a `hidden beast` number, since 2 + 531 + 1 + 53 + 72 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 26727655 + ... + 26728601.

Almost surely, 2^25311537216 is an apocalyptic number.

25311537216 is the 159096-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25311537216

25311537216 is an abundant number, since it is smaller than the sum of its proper divisors (59173680783).

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

25311537216 is an frugal number, since it uses more digits than its factorization.

25311537216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926 (or 959 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

Multiplying 25311537216 by its sum of digits (36), we get a square (911215339776 = 954576²).

25311537216 divided by its sum of digits (36) gives a square (703098256 = 26516²).

The spelling of 25311537216 in words is "twenty-five billion, three hundred eleven million, five hundred thirty-seven thousand, two hundred sixteen".