25780685 has 16 divisors (see below), whose sum is σ = 36498432. Its totient is φ = 17107200.

The previous prime is 25780673. The next prime is 25780697. The reversal of 25780685 is 58608752.

It is an interprime number because it is at equal distance from previous prime (25780673) and next prime (25780697).

It is not a de Polignac number, because 25780685 - 2⁶ = 25780621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10796 + ... + 12965.

It is an arithmetic number, because the mean of its divisors is an integer number (2281152).

Almost surely, 2^25780685 is an apocalyptic number.

It is an amenable number.

25780685 is a deficient number, since it is larger than the sum of its proper divisors (10717747).

25780685 is a wasteful number, since it uses less digits than its factorization.

25780685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23804.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 25780685 is about 5077.4683652387. The cubic root of 25780685 is about 295.4142795691.

The spelling of 25780685 in words is "twenty-five million, seven hundred eighty thousand, six hundred eighty-five".