127818612462997 has 4 divisors (see below), whose sum is σ = 132226150823820. Its totient is φ = 123411074102176.

The previous prime is 127818612462943. The next prime is 127818612463027. The reversal of 127818612462997 is 799264216818721.

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 104387068566001 + 23431543896996 = 10216999^2 + 4840614^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127818612462997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127818612462097) 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, 2203769180368 + ... + 2203769180425.

It is an arithmetic number, because the mean of its divisors is an integer number (33056537705955).

Almost surely, 2^{127818612462997} is an apocalyptic number.

It is an amenable number.

127818612462997 is a deficient number, since it is larger than the sum of its proper divisors (4407538360823).

127818612462997 is an equidigital number, since it uses as much as digits as its factorization.

127818612462997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4407538360822.

The product of its digits is 292626432, while the sum is 73.

The spelling of 127818612462997 in words is "one hundred twenty-seven trillion, eight hundred eighteen billion, six hundred twelve million, four hundred sixty-two thousand, nine hundred ninety-seven".