26213231261 has 16 divisors (see below), whose sum is σ = 31278316800. Its totient is φ = 21479344128.

The previous prime is 26213231251. The next prime is 26213231267. The reversal of 26213231261 is 16213231262.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 26213231261 - 2⁶ = 26213231197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26213231267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242525 + ... + 333533.

It is an arithmetic number, because the mean of its divisors is an integer number (1954894800).

Almost surely, 2^26213231261 is an apocalyptic number.

It is an amenable number.

26213231261 is a deficient number, since it is larger than the sum of its proper divisors (5065085539).

26213231261 is a wasteful number, since it uses less digits than its factorization.

26213231261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92828.

The product of its digits is 5184, while the sum is 29.

Subtracting from 26213231261 its reverse (16213231262), we obtain a palindrome (9999999999).

The spelling of 26213231261 in words is "twenty-six billion, two hundred thirteen million, two hundred thirty-one thousand, two hundred sixty-one".