25979555 has 24 divisors (see below), whose sum is σ = 38180880. Its totient is φ = 16873920.

The previous prime is 25979549. The next prime is 25979561. The reversal of 25979555 is 55597952.

It is an interprime number because it is at equal distance from previous prime (25979549) and next prime (25979561).

It is not a de Polignac number, because 25979555 - 2¹⁸ = 25717411 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1865 + ... + 7445.

It is an arithmetic number, because the mean of its divisors is an integer number (1590870).

Almost surely, 2^25979555 is an apocalyptic number.

25979555 is a deficient number, since it is larger than the sum of its proper divisors (12201325).

25979555 is a wasteful number, since it uses less digits than its factorization.

25979555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5619 (or 5612 counting only the distinct ones).

The product of its digits is 708750, while the sum is 47.

The square root of 25979555 is about 5097.0143221302. The cubic root of 25979555 is about 296.1719348985.

The spelling of 25979555 in words is "twenty-five million, nine hundred seventy-nine thousand, five hundred fifty-five".