127649029921 has 8 divisors (see below), whose sum is σ = 145887192000. Its totient is φ = 109411514448.

The previous prime is 127649029903. The next prime is 127649029927. The reversal of 127649029921 is 129920946721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 127649029921 - 2⁵ = 127649029889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127649029927) 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, 384330 + ... + 634828.

It is an arithmetic number, because the mean of its divisors is an integer number (18235899000).

Almost surely, 2^127649029921 is an apocalyptic number.

It is an amenable number.

127649029921 is a deficient number, since it is larger than the sum of its proper divisors (18238162079).

127649029921 is an equidigital number, since it uses as much as digits as its factorization.

127649029921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323303.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 127649029921 in words is "one hundred twenty-seven billion, six hundred forty-nine million, twenty-nine thousand, nine hundred twenty-one".