25661412026 has 16 divisors (see below), whose sum is σ = 38812644288. Its totient is φ = 12724152000.

The previous prime is 25661412013. The next prime is 25661412043. The reversal of 25661412026 is 62021416652.

It is a Curzon 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, 107441 + ... + 250731.

It is an arithmetic number, because the mean of its divisors is an integer number (2425790268).

Almost surely, 2^25661412026 is an apocalyptic number.

25661412026 is a deficient number, since it is larger than the sum of its proper divisors (13151232262).

25661412026 is a wasteful number, since it uses less digits than its factorization.

25661412026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144037.

The product of its (nonzero) digits is 34560, while the sum is 35.

Adding to 25661412026 its reverse (62021416652), we get a palindrome (87682828678).

The spelling of 25661412026 in words is "twenty-five billion, six hundred sixty-one million, four hundred twelve thousand, twenty-six".