126499661123 has 12 divisors (see below), whose sum is σ = 139567706088. Its totient is φ = 113707482240.

The previous prime is 126499661087. The next prime is 126499661137. The reversal of 126499661123 is 321166994621.

It is not a de Polignac number, because 126499661123 - 2⁶ = 126499661059 is a prime.

It is a super-2 number, since 2×126499661123² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126499661173) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 638786 + ... + 813047.

It is an arithmetic number, because the mean of its divisors is an integer number (11630642174).

Almost surely, 2^126499661123 is an apocalyptic number.

126499661123 is a deficient number, since it is larger than the sum of its proper divisors (13068044965).

126499661123 is an equidigital number, since it uses as much as digits as its factorization.

126499661123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452022 (or 1451933 counting only the distinct ones).

The product of its digits is 839808, while the sum is 50.

The spelling of 126499661123 in words is "one hundred twenty-six billion, four hundred ninety-nine million, six hundred sixty-one thousand, one hundred twenty-three".