25816801 has 4 divisors (see below), whose sum is σ = 27175600. Its totient is φ = 24458004.

The previous prime is 25816799. The next prime is 25816811. The reversal of 25816801 is 10861852.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25816801 - 2¹ = 25816799 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25816811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 679371 + ... + 679408.

It is an arithmetic number, because the mean of its divisors is an integer number (6793900).

Almost surely, 2^25816801 is an apocalyptic number.

It is an amenable number.

25816801 is a deficient number, since it is larger than the sum of its proper divisors (1358799).

25816801 is a wasteful number, since it uses less digits than its factorization.

25816801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358798.

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 25816801 is about 5081.0236173433. The cubic root of 25816801 is about 295.5521632065.

The spelling of 25816801 in words is "twenty-five million, eight hundred sixteen thousand, eight hundred one".