126863212065 has 16 divisors (see below), whose sum is σ = 203852308608. Its totient is φ = 67369990016.

The previous prime is 126863212033. The next prime is 126863212103. The reversal of 126863212065 is 560212368621.

It is a cyclic number.

It is not a de Polignac number, because 126863212065 - 2⁵ = 126863212033 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18145749 + ... + 18152738.

It is an arithmetic number, because the mean of its divisors is an integer number (12740769288).

Almost surely, 2^126863212065 is an apocalyptic number.

126863212065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126863212065 is a deficient number, since it is larger than the sum of its proper divisors (76989096543).

126863212065 is a wasteful number, since it uses less digits than its factorization.

126863212065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36298728.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 126863212065 in words is "one hundred twenty-six billion, eight hundred sixty-three million, two hundred twelve thousand, sixty-five".