126591364789 has 16 divisors (see below), whose sum is σ = 127914467184. Its totient is φ = 125276544000.

The previous prime is 126591364787. The next prime is 126591364811. The reversal of 126591364789 is 987463195621.

It can be written as a sum of positive squares in 8 ways, for example, as 74215380625 + 52375984164 = 272425^2 + 228858^2 .

It is a cyclic number.

It is not a de Polignac number, because 126591364789 - 2¹ = 126591364787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126591364787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37529107 + ... + 37532479.

It is an arithmetic number, because the mean of its divisors is an integer number (7994654199).

Almost surely, 2^126591364789 is an apocalyptic number.

It is an amenable number.

126591364789 is a deficient number, since it is larger than the sum of its proper divisors (1323102395).

126591364789 is a wasteful number, since it uses less digits than its factorization.

126591364789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4488.

The product of its digits is 19595520, while the sum is 61.

The spelling of 126591364789 in words is "one hundred twenty-six billion, five hundred ninety-one million, three hundred sixty-four thousand, seven hundred eighty-nine".