26213221636 has 24 divisors (see below), whose sum is σ = 55185730880. Its totient is φ = 10642961952.

The previous prime is 26213221631. The next prime is 26213221691. The reversal of 26213221636 is 63612231262.

It is not an unprimeable number, because it can be changed into a prime (26213221631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24635955 + ... + 24637018.

Almost surely, 2^26213221636 is an apocalyptic number.

It is an amenable number.

26213221636 is an abundant number, since it is smaller than the sum of its proper divisors (28972509244).

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

26213221636 is a wasteful number, since it uses less digits than its factorization.

26213221636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49273003 (or 49273001 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

Adding to 26213221636 its reverse (63612231262), we get a palindrome (89825452898).

The spelling of 26213221636 in words is "twenty-six billion, two hundred thirteen million, two hundred twenty-one thousand, six hundred thirty-six".