26634643662 has 80 divisors (see below), whose sum is σ = 59851848960. Its totient is φ = 7898154000.

The previous prime is 26634643649. The next prime is 26634643663.

26634643662 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26634643663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 4125537 + ... + 4131987.

It is an arithmetic number, because the mean of its divisors is an integer number (748148112).

Almost surely, 2^26634643662 is an apocalyptic number.

26634643662 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 26634643662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29925924480).

26634643662 is an abundant number, since it is smaller than the sum of its proper divisors (33217205298).

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

26634643662 is an equidigital number, since it uses as much as digits as its factorization.

26634643662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6547 (or 6514 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 48.

The spelling of 26634643662 in words is "twenty-six billion, six hundred thirty-four million, six hundred forty-three thousand, six hundred sixty-two".