127197918875 has 8 divisors (see below), whose sum is σ = 158743002912. Its totient is φ = 101758335000.

The previous prime is 127197918817. The next prime is 127197918889. The reversal of 127197918875 is 578819791721.

It is a happy number.

It is not a de Polignac number, because 127197918875 - 2¹⁰ = 127197917851 is a prime.

It is a super-2 number, since 2×127197918875² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 508791551 + ... + 508791800.

It is an arithmetic number, because the mean of its divisors is an integer number (19842875364).

Almost surely, 2^127197918875 is an apocalyptic number.

127197918875 is a deficient number, since it is larger than the sum of its proper divisors (31545084037).

127197918875 is an equidigital number, since it uses as much as digits as its factorization.

127197918875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017583366 (or 1017583356 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 65.

The spelling of 127197918875 in words is "one hundred twenty-seven billion, one hundred ninety-seven million, nine hundred eighteen thousand, eight hundred seventy-five".