25681964 has 24 divisors (see below), whose sum is σ = 56034048. Its totient is φ = 10005840.

The previous prime is 25681927. The next prime is 25681969. The reversal of 25681964 is 46918652.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25681969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41384 + ... + 41999.

It is an arithmetic number, because the mean of its divisors is an integer number (2334752).

Almost surely, 2^25681964 is an apocalyptic number.

It is an amenable number.

25681964 is an abundant number, since it is smaller than the sum of its proper divisors (30352084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25681964 is a wasteful number, since it uses less digits than its factorization.

25681964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83405 (or 83403 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 25681964 is about 5067.7375622658. The cubic root of 25681964 is about 295.0367243373.

The spelling of 25681964 in words is "twenty-five million, six hundred eighty-one thousand, nine hundred sixty-four".