127664459 has 12 divisors (see below), whose sum is σ = 138734496. Its totient is φ = 117423072.

The previous prime is 127664437. The next prime is 127664491. The reversal of 127664459 is 954466721.

It is a de Polignac number, because none of the positive numbers 2^k-127664459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127664429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52382 + ... + 54764.

It is an arithmetic number, because the mean of its divisors is an integer number (11561208).

Almost surely, 2^127664459 is an apocalyptic number.

127664459 is a deficient number, since it is larger than the sum of its proper divisors (11070037).

127664459 is a wasteful number, since it uses less digits than its factorization.

127664459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2726 (or 2713 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 127664459 is about 11298.8698107377. The cubic root of 127664459 is about 503.5276646315.

The spelling of 127664459 in words is "one hundred twenty-seven million, six hundred sixty-four thousand, four hundred fifty-nine".