26205017631 has 16 divisors (see below), whose sum is σ = 37630621056. Its totient is φ = 16124920416.

The previous prime is 26205017621. The next prime is 26205017669. The reversal of 26205017631 is 13671050262.

It is not a de Polignac number, because 26205017631 - 2¹⁸ = 26204755487 is a prime.

It is a super-2 number, since 2×26205017631² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26205017592 and 26205017601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26205017621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 986976 + ... + 1013178.

It is an arithmetic number, because the mean of its divisors is an integer number (2351913816).

Almost surely, 2^26205017631 is an apocalyptic number.

26205017631 is a deficient number, since it is larger than the sum of its proper divisors (11425603425).

26205017631 is a wasteful number, since it uses less digits than its factorization.

26205017631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51862.

The product of its (nonzero) digits is 15120, while the sum is 33.

Adding to 26205017631 its reverse (13671050262), we get a palindrome (39876067893).

The spelling of 26205017631 in words is "twenty-six billion, two hundred five million, seventeen thousand, six hundred thirty-one".