126725655577717 has 24 divisors (see below), whose sum is σ = 159894063526680. Its totient is φ = 99738986941440.

The previous prime is 126725655577711. The next prime is 126725655577753. The reversal of 126725655577717 is 717775556527621.

It can be written as a sum of positive squares in 4 ways, for example, as 4884988460401 + 121840667117316 = 2210201^2 + 11038146^2 .

It is not a de Polignac number, because 126725655577717 - 2²⁷ = 126725521359989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 126725655577717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126725655577711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1855229742 + ... + 1855298047.

It is an arithmetic number, because the mean of its divisors is an integer number (6662252646945).

Almost surely, 2^{126725655577717} is an apocalyptic number.

126725655577717 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

126725655577717 is a deficient number, since it is larger than the sum of its proper divisors (33168407948963).

126725655577717 is a wasteful number, since it uses less digits than its factorization.

126725655577717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710527861 (or 3710527854 counting only the distinct ones).

The product of its digits is 1512630000, while the sum is 73.

The spelling of 126725655577717 in words is "one hundred twenty-six trillion, seven hundred twenty-five billion, six hundred fifty-five million, five hundred seventy-seven thousand, seven hundred seventeen".