126687363445 has 4 divisors (see below), whose sum is σ = 152024836140. Its totient is φ = 101349890752.

The previous prime is 126687363443. The next prime is 126687363571. The reversal of 126687363445 is 544363786621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79708534929 + 46978828516 = 282327^2 + 216746^2 .

It is a cyclic number.

It is not a de Polignac number, because 126687363445 - 2¹ = 126687363443 is a prime.

It is a super-3 number, since 3×126687363445³ (a number of 34 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126687363443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12668736340 + ... + 12668736349.

It is an arithmetic number, because the mean of its divisors is an integer number (38006209035).

Almost surely, 2^126687363445 is an apocalyptic number.

It is an amenable number.

126687363445 is a deficient number, since it is larger than the sum of its proper divisors (25337472695).

126687363445 is an equidigital number, since it uses as much as digits as its factorization.

126687363445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25337472694.

The product of its digits is 17418240, while the sum is 55.

The spelling of 126687363445 in words is "one hundred twenty-six billion, six hundred eighty-seven million, three hundred sixty-three thousand, four hundred forty-five".