126210066719 has 4 divisors (see below), whose sum is σ = 137683709160. Its totient is φ = 114736424280.

The previous prime is 126210066709. The next prime is 126210066737. The reversal of 126210066719 is 917660012621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126210066719 is a prime.

It is a super-2 number, since 2×126210066719² (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 (126210066709) 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, 5736821204 + ... + 5736821225.

It is an arithmetic number, because the mean of its divisors is an integer number (34420927290).

Almost surely, 2^126210066719 is an apocalyptic number.

126210066719 is a deficient number, since it is larger than the sum of its proper divisors (11473642441).

126210066719 is a wasteful number, since it uses less digits than its factorization.

126210066719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11473642440.

The product of its (nonzero) digits is 54432, while the sum is 41.

The spelling of 126210066719 in words is "one hundred twenty-six billion, two hundred ten million, sixty-six thousand, seven hundred nineteen".