126973770569 has 2 divisors, whose sum is σ = 126973770570. Its totient is φ = 126973770568.

The previous prime is 126973770557. The next prime is 126973770587. The reversal of 126973770569 is 965077379621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99737219344 + 27236551225 = 315812^2 + 165035^2 .

It is a cyclic number.

It is not a de Polignac number, because 126973770569 - 2¹² = 126973766473 is a prime.

It is a super-2 number, since 2×126973770569² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126973776569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63486885284 + 63486885285.

It is an arithmetic number, because the mean of its divisors is an integer number (63486885285).

Almost surely, 2^126973770569 is an apocalyptic number.

It is an amenable number.

126973770569 is a deficient number, since it is larger than the sum of its proper divisors (1).

126973770569 is an equidigital number, since it uses as much as digits as its factorization.

126973770569 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30005640, while the sum is 62.

The spelling of 126973770569 in words is "one hundred twenty-six billion, nine hundred seventy-three million, seven hundred seventy thousand, five hundred sixty-nine".