25961619 has 16 divisors (see below), whose sum is σ = 36547200. Its totient is φ = 16347456.

The previous prime is 25961599. The next prime is 25961633. The reversal of 25961619 is 91616952.

It is not a de Polignac number, because 25961619 - 2⁷ = 25961491 is a prime.

It is a super-2 number, since 2×25961619² = 1348011322202322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25961219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31687 + ... + 32495.

It is an arithmetic number, because the mean of its divisors is an integer number (2284200).

Almost surely, 2^25961619 is an apocalyptic number.

25961619 is a deficient number, since it is larger than the sum of its proper divisors (10585581).

25961619 is a wasteful number, since it uses less digits than its factorization.

25961619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1394.

The product of its digits is 29160, while the sum is 39.

The square root of 25961619 is about 5095.2545569382. The cubic root of 25961619 is about 296.1037612549.

The spelling of 25961619 in words is "twenty-five million, nine hundred sixty-one thousand, six hundred nineteen".