26288616631 has 2 divisors, whose sum is σ = 26288616632. Its totient is φ = 26288616630.

The previous prime is 26288616593. The next prime is 26288616703. The reversal of 26288616631 is 13661688262.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26288616631 - 2²⁵ = 26255062199 is a prime.

It is a super-2 number, since 2×26288616631² (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 (26288616031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13144308315 + 13144308316.

It is an arithmetic number, because the mean of its divisors is an integer number (13144308316).

Almost surely, 2^26288616631 is an apocalyptic number.

26288616631 is a deficient number, since it is larger than the sum of its proper divisors (1).

26288616631 is an equidigital number, since it uses as much as digits as its factorization.

26288616631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 49.

The spelling of 26288616631 in words is "twenty-six billion, two hundred eighty-eight million, six hundred sixteen thousand, six hundred thirty-one".