126699698242 has 32 divisors (see below), whose sum is σ = 217223146224. Its totient is φ = 54906163200.

The previous prime is 126699698231. The next prime is 126699698297. The reversal of 126699698242 is 242896996621.

It can be written as a sum of positive squares in 8 ways, for example, as 59234311161 + 67465387081 = 243381^2 + 259741^2 .

It is a super-2 number, since 2×126699698242² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 154359 + ... + 526522.

Almost surely, 2^126699698242 is an apocalyptic number.

126699698242 is a deficient number, since it is larger than the sum of its proper divisors (90523447982).

126699698242 is a wasteful number, since it uses less digits than its factorization.

126699698242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681334.

The product of its digits is 40310784, while the sum is 64.

The spelling of 126699698242 in words is "one hundred twenty-six billion, six hundred ninety-nine million, six hundred ninety-eight thousand, two hundred forty-two".