26249131636 has 108 divisors (see below), whose sum is σ = 60736455108. Its totient is φ = 9837386496.

The previous prime is 26249131627. The next prime is 26249131697. The reversal of 26249131636 is 63613194262.

It can be written as a sum of positive squares in 2 ways, for example, as 3582022500 + 22667109136 = 59850^2 + 150556^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26249131592 and 26249131601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 905560 + ... + 934096.

Almost surely, 2^26249131636 is an apocalyptic number.

26249131636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26249131636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30368227554).

26249131636 is an abundant number, since it is smaller than the sum of its proper divisors (34487323472).

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

26249131636 is a wasteful number, since it uses less digits than its factorization.

26249131636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28606 (or 28578 counting only the distinct ones).

The product of its digits is 279936, while the sum is 43.

The spelling of 26249131636 in words is "twenty-six billion, two hundred forty-nine million, one hundred thirty-one thousand, six hundred thirty-six".