127646631 has 32 divisors (see below), whose sum is σ = 220216320. Its totient is φ = 71559072.

The previous prime is 127646611. The next prime is 127646639. The reversal of 127646631 is 136646721.

It is a happy number.

127646631 is a `hidden beast` number, since 1 + 2 + 7 + 646 + 6 + 3 + 1 = 666.

It is not a de Polignac number, because 127646631 - 2⁶ = 127646567 is a prime.

It is a super-3 number, since 3×127646631³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127646639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3646 + ... + 16388.

It is an arithmetic number, because the mean of its divisors is an integer number (6881760).

Almost surely, 2^127646631 is an apocalyptic number.

127646631 is a deficient number, since it is larger than the sum of its proper divisors (92569689).

127646631 is a wasteful number, since it uses less digits than its factorization.

127646631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12812 (or 12806 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 127646631 is about 11298.0808547293. The cubic root of 127646631 is about 503.5042247768.

The spelling of 127646631 in words is "one hundred twenty-seven million, six hundred forty-six thousand, six hundred thirty-one".