25716816 has 60 divisors (see below), whose sum is σ = 72346560. Its totient is φ = 8527680.

The previous prime is 25716797. The next prime is 25716827. The reversal of 25716816 is 61861752.

25716816 is a `hidden beast` number, since 2 + 571 + 6 + 81 + 6 = 666.

It is a super-2 number, since 2×25716816² = 1322709250355712, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38695 + ... + 39353.

It is an arithmetic number, because the mean of its divisors is an integer number (1205776).

Almost surely, 2^25716816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25716816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36173280).

25716816 is an abundant number, since it is smaller than the sum of its proper divisors (46629744).

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

25716816 is a wasteful number, since it uses less digits than its factorization.

25716816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944 (or 935 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 25716816 is about 5071.1750117700. The cubic root of 25716816 is about 295.1701249869.

The spelling of 25716816 in words is "twenty-five million, seven hundred sixteen thousand, eight hundred sixteen".