127664563 has 4 divisors (see below), whose sum is σ = 137484928. Its totient is φ = 117844200.

The previous prime is 127664557. The next prime is 127664569. The reversal of 127664563 is 365466721.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (127664557) and next prime (127664569).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127664563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (127664569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4910163 + ... + 4910188.

It is an arithmetic number, because the mean of its divisors is an integer number (34371232).

Almost surely, 2^127664563 is an apocalyptic number.

127664563 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

127664563 is a deficient number, since it is larger than the sum of its proper divisors (9820365).

127664563 is an equidigital number, since it uses as much as digits as its factorization.

127664563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9820364.

The product of its digits is 181440, while the sum is 40.

The square root of 127664563 is about 11298.8744129670. The cubic root of 127664563 is about 503.5278013620.

The spelling of 127664563 in words is "one hundred twenty-seven million, six hundred sixty-four thousand, five hundred sixty-three".