25880260138 has 4 divisors (see below), whose sum is σ = 38820390210. Its totient is φ = 12940130068.

The previous prime is 25880260061. The next prime is 25880260141. The reversal of 25880260138 is 83106208852.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13704682489 + 12175577649 = 117067^2 + 110343^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25880260094 and 25880260103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6470065033 + ... + 6470065036.

Almost surely, 2^25880260138 is an apocalyptic number.

25880260138 is a deficient number, since it is larger than the sum of its proper divisors (12940130072).

25880260138 is a wasteful number, since it uses less digits than its factorization.

25880260138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12940130071.

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 25880260138 in words is "twenty-five billion, eight hundred eighty million, two hundred sixty thousand, one hundred thirty-eight".