25155663 has 16 divisors (see below), whose sum is σ = 37287936. Its totient is φ = 14980320.

The previous prime is 25155661. The next prime is 25155667. The reversal of 25155663 is 36655152.

It is not a de Polignac number, because 25155663 - 2¹ = 25155661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25155661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9195 + ... + 11612.

It is an arithmetic number, because the mean of its divisors is an integer number (2330496).

Almost surely, 2^25155663 is an apocalyptic number.

25155663 is a deficient number, since it is larger than the sum of its proper divisors (12132273).

25155663 is a wasteful number, since it uses less digits than its factorization.

25155663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20854.

The product of its digits is 27000, while the sum is 33.

The square root of 25155663 is about 5015.5421441754. The cubic root of 25155663 is about 293.0074004040.

The spelling of 25155663 in words is "twenty-five million, one hundred fifty-five thousand, six hundred sixty-three".