126819992869 has 4 divisors (see below), whose sum is σ = 126820987360. Its totient is φ = 126818998380.

The previous prime is 126819992863. The next prime is 126819992891. The reversal of 126819992869 is 968299918621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 126819992869 - 2³ = 126819992861 is a prime.

It is a super-2 number, since 2×126819992869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126819992798 and 126819992807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126819992861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271929 + ... + 572350.

It is an arithmetic number, because the mean of its divisors is an integer number (31705246840).

Almost surely, 2^126819992869 is an apocalyptic number.

It is an amenable number.

126819992869 is a deficient number, since it is larger than the sum of its proper divisors (994491).

126819992869 is an equidigital number, since it uses as much as digits as its factorization.

126819992869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994490.

The product of its digits is 60466176, while the sum is 70.

The spelling of 126819992869 in words is "one hundred twenty-six billion, eight hundred nineteen million, nine hundred ninety-two thousand, eight hundred sixty-nine".