126881471777 has 2 divisors, whose sum is σ = 126881471778. Its totient is φ = 126881471776.

The previous prime is 126881471737. The next prime is 126881471833. The reversal of 126881471777 is 777174188621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77016795361 + 49864676416 = 277519^2 + 223304^2 .

It is a cyclic number.

It is not a de Polignac number, because 126881471777 - 2⁶ = 126881471713 is a prime.

It is not a weakly prime, because it can be changed into another prime (126881471737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63440735888 + 63440735889.

It is an arithmetic number, because the mean of its divisors is an integer number (63440735889).

Almost surely, 2^126881471777 is an apocalyptic number.

It is an amenable number.

126881471777 is a deficient number, since it is larger than the sum of its proper divisors (1).

126881471777 is an equidigital number, since it uses as much as digits as its factorization.

126881471777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7375872, while the sum is 59.

The spelling of 126881471777 in words is "one hundred twenty-six billion, eight hundred eighty-one million, four hundred seventy-one thousand, seven hundred seventy-seven".