126353944369 has 3 divisors (see below), whose sum is σ = 126354299833. Its totient is φ = 126353588906.

The previous prime is 126353944363. The next prime is 126353944393. The reversal of 126353944369 is 963449353621.

The square root of 126353944369 is 355463.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 963449353621 = 491083 ⋅1961887.

It is not a de Polignac number, because 126353944369 - 2¹⁷ = 126353813297 is a prime.

It is a super-2 number, since 2×126353944369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126353944363) 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 in 2 ways as a sum of consecutive naturals, for example, 177732 + ... + 533194.

Almost surely, 2^126353944369 is an apocalyptic number.

126353944369 is the 355463-rd square number.

126353944369 is the 177732-nd centered octagonal number.

It is an amenable number.

126353944369 is a deficient number, since it is larger than the sum of its proper divisors (355464).

126353944369 is an frugal number, since it uses more digits than its factorization.

126353944369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710926 (or 355463 counting only the distinct ones).

The product of its digits is 12597120, while the sum is 55.

The spelling of 126353944369 in words is "one hundred twenty-six billion, three hundred fifty-three million, nine hundred forty-four thousand, three hundred sixty-nine".