127999729939870 has 24 divisors (see below), whose sum is σ = 238618283725224. Its totient is φ = 49434378456288.

The previous prime is 127999729939853. The next prime is 127999729939937. The reversal of 127999729939870 is 78939927999721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7609963644 + ... + 7609980463.

It is an arithmetic number, because the mean of its divisors is an integer number (9942428488551).

Almost surely, 2^{127999729939870} is an apocalyptic number.

127999729939870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

127999729939870 is a deficient number, since it is larger than the sum of its proper divisors (110618553785354).

127999729939870 is a wasteful number, since it uses less digits than its factorization.

127999729939870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15219944172 (or 15219944143 counting only the distinct ones).

The product of its (nonzero) digits is 17499289248, while the sum is 91.

The spelling of 127999729939870 in words is "one hundred twenty-seven trillion, nine hundred ninety-nine billion, seven hundred twenty-nine million, nine hundred thirty-nine thousand, eight hundred seventy".