26221403631 has 16 divisors (see below), whose sum is σ = 35181393408. Its totient is φ = 17371236000.

The previous prime is 26221403617. The next prime is 26221403633. The reversal of 26221403631 is 13630412262.

It is not a de Polignac number, because 26221403631 - 2²¹ = 26219306479 is a prime.

It is a super-2 number, since 2×26221403631² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26221403633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2675961 + ... + 2685741.

It is an arithmetic number, because the mean of its divisors is an integer number (2198837088).

Almost surely, 2^26221403631 is an apocalyptic number.

26221403631 is a deficient number, since it is larger than the sum of its proper divisors (8959989777).

26221403631 is a wasteful number, since it uses less digits than its factorization.

26221403631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15302.

The product of its (nonzero) digits is 10368, while the sum is 30.

Adding to 26221403631 its reverse (13630412262), we get a palindrome (39851815893).

The spelling of 26221403631 in words is "twenty-six billion, two hundred twenty-one million, four hundred three thousand, six hundred thirty-one".