126044270765381 has 2 divisors, whose sum is σ = 126044270765382. Its totient is φ = 126044270765380.

The previous prime is 126044270765377. The next prime is 126044270765383. The reversal of 126044270765381 is 183567072440621.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121599801472900 + 4444469292481 = 11027230^2 + 2108191^2 .

It is a cyclic number.

It is not a de Polignac number, because 126044270765381 - 2² = 126044270765377 is a prime.

It is a super-2 number, since 2×126044270765381² (a number of 29 digits) contains 22 as substring.

Together with 126044270765383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126044270765383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63022135382690 + 63022135382691.

It is an arithmetic number, because the mean of its divisors is an integer number (63022135382691).

Almost surely, 2^{126044270765381} is an apocalyptic number.

It is an amenable number.

126044270765381 is a deficient number, since it is larger than the sum of its proper divisors (1).

126044270765381 is an equidigital number, since it uses as much as digits as its factorization.

126044270765381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 56.

The spelling of 126044270765381 in words is "one hundred twenty-six trillion, forty-four billion, two hundred seventy million, seven hundred sixty-five thousand, three hundred eighty-one".