127251771656 has 16 divisors (see below), whose sum is σ = 238606861740. Its totient is φ = 63623275200.

The previous prime is 127251771613. The next prime is 127251771677. The reversal of 127251771656 is 656177152721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 124139247556 + 3112524100 = 352334^2 + 55790^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110795 + ... + 516506.

Almost surely, 2^127251771656 is an apocalyptic number.

It is an amenable number.

127251771656 is a deficient number, since it is larger than the sum of its proper divisors (111355090084).

127251771656 is a wasteful number, since it uses less digits than its factorization.

127251771656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652664 (or 652660 counting only the distinct ones).

The product of its digits is 1234800, while the sum is 50.

The spelling of 127251771656 in words is "one hundred twenty-seven billion, two hundred fifty-one million, seven hundred seventy-one thousand, six hundred fifty-six".