127721458346 has 4 divisors (see below), whose sum is σ = 191582187522. Its totient is φ = 63860729172.

The previous prime is 127721458343. The next prime is 127721458357. The reversal of 127721458346 is 643854127721.

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., 127231323025 + 490135321 = 356695^2 + 22139^2 .

It is a junction number, because it is equal to n+sod(n) for n = 127721458294 and 127721458303.

It is not an unprimeable number, because it can be changed into a prime (127721458343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31930364585 + ... + 31930364588.

Almost surely, 2^127721458346 is an apocalyptic number.

127721458346 is a deficient number, since it is larger than the sum of its proper divisors (63860729176).

127721458346 is an equidigital number, since it uses as much as digits as its factorization.

127721458346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63860729175.

The product of its digits is 2257920, while the sum is 50.

The spelling of 127721458346 in words is "one hundred twenty-seven billion, seven hundred twenty-one million, four hundred fifty-eight thousand, three hundred forty-six".