26421612431 has 2 divisors, whose sum is σ = 26421612432. Its totient is φ = 26421612430.

The previous prime is 26421612409. The next prime is 26421612463. The reversal of 26421612431 is 13421612462.

It is an a-pointer prime, because the next prime (26421612463) can be obtained adding 26421612431 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26421612431 - 2¹⁸ = 26421350287 is a prime.

It is a super-2 number, since 2×26421612431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26421612631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13210806215 + 13210806216.

It is an arithmetic number, because the mean of its divisors is an integer number (13210806216).

Almost surely, 2^26421612431 is an apocalyptic number.

26421612431 is a deficient number, since it is larger than the sum of its proper divisors (1).

26421612431 is an equidigital number, since it uses as much as digits as its factorization.

26421612431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 32.

The spelling of 26421612431 in words is "twenty-six billion, four hundred twenty-one million, six hundred twelve thousand, four hundred thirty-one".