126251616017 has 4 divisors (see below), whose sum is σ = 126370386240. Its totient is φ = 126132845796.

The previous prime is 126251616013. The next prime is 126251616047. The reversal of 126251616017 is 710616152621.

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 an emirpimes, since its reverse is a distinct semiprime: 710616152621 = 277 ⋅2565401273.

It is a cyclic number.

It is not a de Polignac number, because 126251616017 - 2² = 126251616013 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126251616011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59383517 + ... + 59385642.

It is an arithmetic number, because the mean of its divisors is an integer number (31592596560).

Almost surely, 2^126251616017 is an apocalyptic number.

It is an amenable number.

126251616017 is a deficient number, since it is larger than the sum of its proper divisors (118770223).

126251616017 is a wasteful number, since it uses less digits than its factorization.

126251616017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118770222.

The product of its (nonzero) digits is 30240, while the sum is 38.

Adding to 126251616017 its reverse (710616152621), we get a palindrome (836867768638).

The spelling of 126251616017 in words is "one hundred twenty-six billion, two hundred fifty-one million, six hundred sixteen thousand, seventeen".