127316211663218 has 6 divisors (see below), whose sum is σ = 190974341430639. Its totient is φ = 63658097853006.

The previous prime is 127316211663181. The next prime is 127316211663257. The reversal of 127316211663218 is 812366112613721.

It can be written as a sum of positive squares in only one way, i.e., 63658105831609 + 63658105831609 = 7978603^2 + 7978603^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=7978603.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11967905 + ... + 19946507.

Almost surely, 2^{127316211663218} is an apocalyptic number.

127316211663218 is a deficient number, since it is larger than the sum of its proper divisors (63658129767421).

127316211663218 is an frugal number, since it uses more digits than its factorization.

127316211663218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15957208 (or 7978605 counting only the distinct ones).

The product of its digits is 870912, while the sum is 50.

The spelling of 127316211663218 in words is "one hundred twenty-seven trillion, three hundred sixteen billion, two hundred eleven million, six hundred sixty-three thousand, two hundred eighteen".