126559921168 has 20 divisors (see below), whose sum is σ = 245512974780. Its totient is φ = 63201734144.

The previous prime is 126559921129. The next prime is 126559921181. The reversal of 126559921168 is 861129955621.

It can be written as a sum of positive squares in 2 ways, for example, as 99219960064 + 27339961104 = 314992^2 + 165348^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4875805 + ... + 4901692.

It is an arithmetic number, because the mean of its divisors is an integer number (12275648739).

Almost surely, 2^126559921168 is an apocalyptic number.

It is an amenable number.

126559921168 is a deficient number, since it is larger than the sum of its proper divisors (118953053612).

126559921168 is an equidigital number, since it uses as much as digits as its factorization.

126559921168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9778314 (or 9778308 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 55.

The spelling of 126559921168 in words is "one hundred twenty-six billion, five hundred fifty-nine million, nine hundred twenty-one thousand, one hundred sixty-eight".