126899648619 has 4 divisors (see below), whose sum is σ = 169199531496. Its totient is φ = 84599765744.

The previous prime is 126899648599. The next prime is 126899648627. The reversal of 126899648619 is 916846998621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 916846998621 = 3 ⋅305615666207.

It is a cyclic number.

It is not a de Polignac number, because 126899648619 - 2²⁰ = 126898600043 is a prime.

It is a super-2 number, since 2×126899648619² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126899648639) 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 3 ways as a sum of consecutive naturals, for example, 21149941434 + ... + 21149941439.

It is an arithmetic number, because the mean of its divisors is an integer number (42299882874).

Almost surely, 2^126899648619 is an apocalyptic number.

126899648619 is a deficient number, since it is larger than the sum of its proper divisors (42299882877).

126899648619 is an equidigital number, since it uses as much as digits as its factorization.

126899648619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42299882876.

The product of its digits is 80621568, while the sum is 69.

The spelling of 126899648619 in words is "one hundred twenty-six billion, eight hundred ninety-nine million, six hundred forty-eight thousand, six hundred nineteen".