126712703571 has 4 divisors (see below), whose sum is σ = 168950271432. Its totient is φ = 84475135712.

The previous prime is 126712703539. The next prime is 126712703581. The reversal of 126712703571 is 175307217621.

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 126712703571 - 2⁵ = 126712703539 is a prime.

It is a super-2 number, since 2×126712703571² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (126712703581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21118783926 + ... + 21118783931.

It is an arithmetic number, because the mean of its divisors is an integer number (42237567858).

Almost surely, 2^126712703571 is an apocalyptic number.

126712703571 is a deficient number, since it is larger than the sum of its proper divisors (42237567861).

126712703571 is an equidigital number, since it uses as much as digits as its factorization.

126712703571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42237567860.

The product of its (nonzero) digits is 123480, while the sum is 42.

The spelling of 126712703571 in words is "one hundred twenty-six billion, seven hundred twelve million, seven hundred three thousand, five hundred seventy-one".