126589281279991 has 2 divisors, whose sum is σ = 126589281279992. Its totient is φ = 126589281279990.

The previous prime is 126589281279983. The next prime is 126589281280003. The reversal of 126589281279991 is 199972182985621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 126589281279991 - 2³ = 126589281279983 is a prime.

It is a super-2 number, since 2×126589281279991² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126589281279491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63294640639995 + 63294640639996.

It is an arithmetic number, because the mean of its divisors is an integer number (63294640639996).

Almost surely, 2^{126589281279991} is an apocalyptic number.

126589281279991 is a deficient number, since it is larger than the sum of its proper divisors (1).

126589281279991 is an equidigital number, since it uses as much as digits as its factorization.

126589281279991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 705438720, while the sum is 79.

The spelling of 126589281279991 in words is "one hundred twenty-six trillion, five hundred eighty-nine billion, two hundred eighty-one million, two hundred seventy-nine thousand, nine hundred ninety-one".