127701913409 has 4 divisors (see below), whose sum is σ = 145945043904. Its totient is φ = 109458782916.

The previous prime is 127701913397. The next prime is 127701913667. The reversal of 127701913409 is 904319107721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 904319107721 = 251 ⋅3602864971.

It is not a de Polignac number, because 127701913409 - 2²⁰ = 127700864833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 127701913409.

It is not an unprimeable number, because it can be changed into a prime (127701913309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9121565237 + ... + 9121565250.

It is an arithmetic number, because the mean of its divisors is an integer number (36486260976).

Almost surely, 2^127701913409 is an apocalyptic number.

It is an amenable number.

127701913409 is a deficient number, since it is larger than the sum of its proper divisors (18243130495).

127701913409 is an equidigital number, since it uses as much as digits as its factorization.

127701913409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18243130494.

The product of its (nonzero) digits is 95256, while the sum is 44.

The spelling of 127701913409 in words is "one hundred twenty-seven billion, seven hundred one million, nine hundred thirteen thousand, four hundred nine".