127835165729 has 4 divisors (see below), whose sum is σ = 127835916180. Its totient is φ = 127834415280.

The previous prime is 127835165707. The next prime is 127835165749. The reversal of 127835165729 is 927561538721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 14615329 + 127820550400 = 3823^2 + 357520^2 .

It is a cyclic number.

It is not a de Polignac number, because 127835165729 - 2⁸ = 127835165473 is a prime.

It is a super-2 number, since 2×127835165729² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127835165749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16859 + ... + 505919.

It is an arithmetic number, because the mean of its divisors is an integer number (31958979045).

Almost surely, 2^127835165729 is an apocalyptic number.

It is an amenable number.

127835165729 is a deficient number, since it is larger than the sum of its proper divisors (750451).

127835165729 is an equidigital number, since it uses as much as digits as its factorization.

127835165729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750450.

The product of its digits is 6350400, while the sum is 56.

The spelling of 127835165729 in words is "one hundred twenty-seven billion, eight hundred thirty-five million, one hundred sixty-five thousand, seven hundred twenty-nine".