126785241889 has 2 divisors, whose sum is σ = 126785241890. Its totient is φ = 126785241888.

The previous prime is 126785241767. The next prime is 126785241901. The reversal of 126785241889 is 988142587621.

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., 121586110864 + 5199131025 = 348692^2 + 72105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126785241889 is a prime.

It is not a weakly prime, because it can be changed into another prime (126785241389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63392620944 + 63392620945.

It is an arithmetic number, because the mean of its divisors is an integer number (63392620945).

Almost surely, 2^126785241889 is an apocalyptic number.

It is an amenable number.

126785241889 is a deficient number, since it is larger than the sum of its proper divisors (1).

126785241889 is an equidigital number, since it uses as much as digits as its factorization.

126785241889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 61.

The spelling of 126785241889 in words is "one hundred twenty-six billion, seven hundred eighty-five million, two hundred forty-one thousand, eight hundred eighty-nine".