25919655 has 32 divisors (see below), whose sum is σ = 42577920. Its totient is φ = 13461120.

The previous prime is 25919653. The next prime is 25919671. The reversal of 25919655 is 55691952.

It is not a de Polignac number, because 25919655 - 2¹ = 25919653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25919651) 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 31 ways as a sum of consecutive naturals, for example, 135610 + ... + 135800.

It is an arithmetic number, because the mean of its divisors is an integer number (1330560).

Almost surely, 2^25919655 is an apocalyptic number.

25919655 is a deficient number, since it is larger than the sum of its proper divisors (16658265).

25919655 is a wasteful number, since it uses less digits than its factorization.

25919655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391.

The product of its digits is 121500, while the sum is 42.

The square root of 25919655 is about 5091.1349422305. The cubic root of 25919655 is about 295.9441358843.

It can be divided in two parts, 2591 and 9655, that added together give a triangular number (12246 = T₁₅₆).

The spelling of 25919655 in words is "twenty-five million, nine hundred nineteen thousand, six hundred fifty-five".