25941814538 has 4 divisors (see below), whose sum is σ = 38912721810. Its totient is φ = 12970907268.

The previous prime is 25941814511. The next prime is 25941814583. The reversal of 25941814538 is 83541814952.

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., 25704746929 + 237067609 = 160327^2 + 15397^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6485453633 + ... + 6485453636.

Almost surely, 2^25941814538 is an apocalyptic number.

25941814538 is a deficient number, since it is larger than the sum of its proper divisors (12970907272).

25941814538 is a wasteful number, since it uses less digits than its factorization.

25941814538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12970907271.

The product of its digits is 1382400, while the sum is 50.

The spelling of 25941814538 in words is "twenty-five billion, nine hundred forty-one million, eight hundred fourteen thousand, five hundred thirty-eight".