127638576563 has 2 divisors, whose sum is σ = 127638576564. Its totient is φ = 127638576562.

The previous prime is 127638576557. The next prime is 127638576587. The reversal of 127638576563 is 365675836721.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127638576563 is a prime.

It is a super-3 number, since 3×127638576563³ (a number of 34 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (127638576463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63819288281 + 63819288282.

It is an arithmetic number, because the mean of its divisors is an integer number (63819288282).

Almost surely, 2^127638576563 is an apocalyptic number.

127638576563 is a deficient number, since it is larger than the sum of its proper divisors (1).

127638576563 is an equidigital number, since it uses as much as digits as its factorization.

127638576563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38102400, while the sum is 59.

The spelling of 127638576563 in words is "one hundred twenty-seven billion, six hundred thirty-eight million, five hundred seventy-six thousand, five hundred sixty-three".