126711889919 has 4 divisors (see below), whose sum is σ = 127280104896. Its totient is φ = 126143674944.

The previous prime is 126711889907. The next prime is 126711889937. The reversal of 126711889919 is 919988117621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 126711889919 - 2²⁰ = 126710841343 is a prime.

It is a super-2 number, since 2×126711889919² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126711889999) 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, 284107154 + ... + 284107599.

It is an arithmetic number, because the mean of its divisors is an integer number (31820026224).

Almost surely, 2^126711889919 is an apocalyptic number.

126711889919 is a deficient number, since it is larger than the sum of its proper divisors (568214977).

126711889919 is an equidigital number, since it uses as much as digits as its factorization.

126711889919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568214976.

The product of its digits is 3919104, while the sum is 62.

The spelling of 126711889919 in words is "one hundred twenty-six billion, seven hundred eleven million, eight hundred eighty-nine thousand, nine hundred nineteen".