127999999994 has 4 divisors (see below), whose sum is σ = 191999999994. Its totient is φ = 63999999996.

The previous prime is 127999999943. The next prime is 127999999997. The reversal of 127999999994 is 499999999721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 125808543025 + 2191456969 = 354695^2 + 46813^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (127999999997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31999999997 + ... + 32000000000.

Almost surely, 2^127999999994 is an apocalyptic number.

127999999994 is a deficient number, since it is larger than the sum of its proper divisors (64000000000).

127999999994 is an equidigital number, since it uses as much as digits as its factorization.

127999999994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63999999999.

The product of its digits is 2410616376, while the sum is 86.

The spelling of 127999999994 in words is "one hundred twenty-seven billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-four".