25540633 has 4 divisors (see below), whose sum is σ = 25697488. Its totient is φ = 25383780.

The previous prime is 25540607. The next prime is 25540651. The reversal of 25540633 is 33604552.

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 25540633 - 2¹⁷ = 25409561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25540673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78183 + ... + 78508.

It is an arithmetic number, because the mean of its divisors is an integer number (6424372).

Almost surely, 2^25540633 is an apocalyptic number.

It is an amenable number.

25540633 is a deficient number, since it is larger than the sum of its proper divisors (156855).

25540633 is a wasteful number, since it uses less digits than its factorization.

25540633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156854.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 25540633 is about 5053.7741342486. The cubic root of 25540633 is about 294.4945207448.

The spelling of 25540633 in words is "twenty-five million, five hundred forty thousand, six hundred thirty-three".