26138415636 has 24 divisors (see below), whose sum is σ = 67766263040. Its totient is φ = 8712805176.

The previous prime is 26138415601. The next prime is 26138415643. The reversal of 26138415636 is 63651483162.

26138415636 is a `hidden beast` number, since 2 + 6 + 1 + 3 + 8 + 4 + 1 + 5 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 26138415591 and 26138415600.

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, 121011076 + ... + 121011291.

Almost surely, 2^26138415636 is an apocalyptic number.

It is an amenable number.

26138415636 is an abundant number, since it is smaller than the sum of its proper divisors (41627847404).

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

26138415636 is a wasteful number, since it uses less digits than its factorization.

26138415636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242022380 (or 242022372 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

Adding to 26138415636 its reverse (63651483162), we get a palindrome (89789898798).

The spelling of 26138415636 in words is "twenty-six billion, one hundred thirty-eight million, four hundred fifteen thousand, six hundred thirty-six".