126722911519 has 4 divisors (see below), whose sum is σ = 128800336360. Its totient is φ = 124645486680.

The previous prime is 126722911421. The next prime is 126722911547. The reversal of 126722911519 is 915119227621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 915119227621 = 145903 ⋅6272107.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126722911519 is a prime.

It is a super-2 number, since 2×126722911519² (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 (126722921519) 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, 1038712329 + ... + 1038712450.

It is an arithmetic number, because the mean of its divisors is an integer number (32200084090).

Almost surely, 2^126722911519 is an apocalyptic number.

126722911519 is a deficient number, since it is larger than the sum of its proper divisors (2077424841).

126722911519 is an equidigital number, since it uses as much as digits as its factorization.

126722911519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2077424840.

The product of its digits is 136080, while the sum is 46.

The spelling of 126722911519 in words is "one hundred twenty-six billion, seven hundred twenty-two million, nine hundred eleven thousand, five hundred nineteen".