126840761017 has 4 divisors (see below), whose sum is σ = 126850400116. Its totient is φ = 126831121920.

The previous prime is 126840761009. The next prime is 126840761053. The reversal of 126840761017 is 710167048621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 92163245056 + 34677515961 = 303584^2 + 186219^2 .

It is a cyclic number.

It is not a de Polignac number, because 126840761017 - 2³ = 126840761009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126840761087) 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, 4799784 + ... + 4826137.

It is an arithmetic number, because the mean of its divisors is an integer number (31712600029).

Almost surely, 2^126840761017 is an apocalyptic number.

It is an amenable number.

126840761017 is a deficient number, since it is larger than the sum of its proper divisors (9639099).

126840761017 is an equidigital number, since it uses as much as digits as its factorization.

126840761017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9639098.

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 126840761017 in words is "one hundred twenty-six billion, eight hundred forty million, seven hundred sixty-one thousand, seventeen".