25680655 has 48 divisors (see below), whose sum is σ = 42172704. Its totient is φ = 14757120.

The previous prime is 25680649. The next prime is 25680671. The reversal of 25680655 is 55608652.

It is not a de Polignac number, because 25680655 - 2²³ = 17292047 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 34669 + ... + 35401.

It is an arithmetic number, because the mean of its divisors is an integer number (878598).

Almost surely, 2^25680655 is an apocalyptic number.

25680655 is a deficient number, since it is larger than the sum of its proper divisors (16492049).

25680655 is a wasteful number, since it uses less digits than its factorization.

25680655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776 (or 769 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 25680655 is about 5067.6084102859. The cubic root of 25680655 is about 295.0317116154.

It can be divided in two parts, 25680 and 655, that added together give a triangular number (26335 = T₂₂₉).

The spelling of 25680655 in words is "twenty-five million, six hundred eighty thousand, six hundred fifty-five".