126886646321 has 2 divisors, whose sum is σ = 126886646322. Its totient is φ = 126886646320.

The previous prime is 126886646309. The next prime is 126886646389. The reversal of 126886646321 is 123646688621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126152832400 + 733813921 = 355180^2 + 27089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126886646321 is a prime.

It is a super-2 number, since 2×126886646321² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (126886606321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63443323160 + 63443323161.

It is an arithmetic number, because the mean of its divisors is an integer number (63443323161).

Almost surely, 2^126886646321 is an apocalyptic number.

It is an amenable number.

126886646321 is a deficient number, since it is larger than the sum of its proper divisors (1).

126886646321 is an equidigital number, since it uses as much as digits as its factorization.

126886646321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3981312, while the sum is 53.

The spelling of 126886646321 in words is "one hundred twenty-six billion, eight hundred eighty-six million, six hundred forty-six thousand, three hundred twenty-one".