25646205232230 has 64 divisors (see below), whose sum is σ = 67180121100288. Its totient is φ = 6214142165760.

The previous prime is 25646205232229. The next prime is 25646205232253. The reversal of 25646205232230 is 3223250264652.

It is a happy number.

It is a super-2 number, since 2×25646205232230² (a number of 28 digits) 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 31 ways as a sum of consecutive naturals, for example, 18839494 + ... + 20154873.

It is an arithmetic number, because the mean of its divisors is an integer number (1049689392192).

Almost surely, 2^{25646205232230} is an apocalyptic number.

25646205232230 is an abundant number, since it is smaller than the sum of its proper divisors (41533915868058).

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

25646205232230 is a wasteful number, since it uses less digits than its factorization.

25646205232230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38996381.

The product of its (nonzero) digits is 1036800, while the sum is 42.

Adding to 25646205232230 its reverse (3223250264652), we get a palindrome (28869455496882).

The spelling of 25646205232230 in words is "twenty-five trillion, six hundred forty-six billion, two hundred five million, two hundred thirty-two thousand, two hundred thirty".