127975847781 has 16 divisors (see below), whose sum is σ = 175036837248. Its totient is φ = 83121772800.

The previous prime is 127975847749. The next prime is 127975847819. The reversal of 127975847781 is 187748579721.

It is not a de Polignac number, because 127975847781 - 2⁵ = 127975847749 is a prime.

It is a super-2 number, since 2×127975847781² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127975842781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 626160 + ... + 805001.

It is an arithmetic number, because the mean of its divisors is an integer number (10939802328).

Almost surely, 2^127975847781 is an apocalyptic number.

It is an amenable number.

127975847781 is a deficient number, since it is larger than the sum of its proper divisors (47060989467).

127975847781 is a wasteful number, since it uses less digits than its factorization.

127975847781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431932.

The product of its digits is 55319040, while the sum is 66.

The spelling of 127975847781 in words is "one hundred twenty-seven billion, nine hundred seventy-five million, eight hundred forty-seven thousand, seven hundred eighty-one".