126571142773 has 2 divisors, whose sum is σ = 126571142774. Its totient is φ = 126571142772.

The previous prime is 126571142723. The next prime is 126571142777. The reversal of 126571142773 is 377241175621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78934588209 + 47636554564 = 280953^2 + 218258^2 .

It is a cyclic number.

It is not a de Polignac number, because 126571142773 - 2¹³ = 126571134581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126571142777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63285571386 + 63285571387.

It is an arithmetic number, because the mean of its divisors is an integer number (63285571387).

Almost surely, 2^126571142773 is an apocalyptic number.

It is an amenable number.

126571142773 is a deficient number, since it is larger than the sum of its proper divisors (1).

126571142773 is an equidigital number, since it uses as much as digits as its factorization.

126571142773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 46.

The spelling of 126571142773 in words is "one hundred twenty-six billion, five hundred seventy-one million, one hundred forty-two thousand, seven hundred seventy-three".