26421136237 has 8 divisors (see below), whose sum is σ = 27067695480. Its totient is φ = 25774679040.

The previous prime is 26421136187. The next prime is 26421136297. The reversal of 26421136237 is 73263112462.

It can be written as a sum of positive squares in 4 ways, for example, as 403768836 + 26017367401 = 20094^2 + 161299^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26421136237 is a prime.

It is a super-2 number, since 2×26421136237² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26421136196 and 26421136205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26421136297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 936189 + ... + 963997.

It is an arithmetic number, because the mean of its divisors is an integer number (3383461935).

Almost surely, 2^26421136237 is an apocalyptic number.

It is an amenable number.

26421136237 is a deficient number, since it is larger than the sum of its proper divisors (646559243).

26421136237 is a wasteful number, since it uses less digits than its factorization.

26421136237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51023.

The product of its digits is 72576, while the sum is 37.

Adding to 26421136237 its reverse (73263112462), we get a palindrome (99684248699).

The spelling of 26421136237 in words is "twenty-six billion, four hundred twenty-one million, one hundred thirty-six thousand, two hundred thirty-seven".