25505669 has 8 divisors (see below), whose sum is σ = 29180928. Its totient is φ = 21838320.

The previous prime is 25505647. The next prime is 25505677. The reversal of 25505669 is 96650552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25505669 - 2¹² = 25501573 is a prime.

It is a super-2 number, since 2×25505669² = 1301078302275122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25505609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9059 + ... + 11535.

It is an arithmetic number, because the mean of its divisors is an integer number (3647616).

Almost surely, 2^25505669 is an apocalyptic number.

It is an amenable number.

25505669 is a deficient number, since it is larger than the sum of its proper divisors (3675259).

25505669 is a wasteful number, since it uses less digits than its factorization.

25505669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3955.

The product of its (nonzero) digits is 81000, while the sum is 38.

The square root of 25505669 is about 5050.3137526296. The cubic root of 25505669 is about 294.3600760402.

The spelling of 25505669 in words is "twenty-five million, five hundred five thousand, six hundred sixty-nine".