127997719199 has 8 divisors (see below), whose sum is σ = 149268477600. Its totient is φ = 109712330448.

The previous prime is 127997719193. The next prime is 127997719207. The reversal of 127997719199 is 991917799721.

It is a de Polignac number, because none of the positive numbers 2^k-127997719199 is a prime.

It is a super-2 number, since 2×127997719199² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127997719193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186585254 + ... + 186585939.

It is an arithmetic number, because the mean of its divisors is an integer number (18658559700).

Almost surely, 2^127997719199 is an apocalyptic number.

127997719199 is a deficient number, since it is larger than the sum of its proper divisors (21270758401).

127997719199 is an frugal number, since it uses more digits than its factorization.

127997719199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373171214 (or 373171200 counting only the distinct ones).

The product of its digits is 40507614, while the sum is 71.

The spelling of 127997719199 in words is "one hundred twenty-seven billion, nine hundred ninety-seven million, seven hundred nineteen thousand, one hundred ninety-nine".