25619964 has 24 divisors (see below), whose sum is σ = 60254208. Its totient is φ = 8472240.

The previous prime is 25619941. The next prime is 25620017. The reversal of 25619964 is 46991652.

It is a happy number.

It is a super-2 number, since 2×25619964² = 1312765110722592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6882 + ... + 9929.

It is an arithmetic number, because the mean of its divisors is an integer number (2510592).

Almost surely, 2^25619964 is an apocalyptic number.

It is an amenable number.

25619964 is an abundant number, since it is smaller than the sum of its proper divisors (34634244).

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

25619964 is a wasteful number, since it uses less digits than its factorization.

25619964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16945 (or 16943 counting only the distinct ones).

The product of its digits is 116640, while the sum is 42.

The square root of 25619964 is about 5061.6167377627. The cubic root of 25619964 is about 294.7991124896.

The spelling of 25619964 in words is "twenty-five million, six hundred nineteen thousand, nine hundred sixty-four".