127988818564 has 6 divisors (see below), whose sum is σ = 223980432494. Its totient is φ = 63994409280.

The previous prime is 127988818547. The next prime is 127988818603. The reversal of 127988818564 is 465818889721.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 89396216064 + 38592602500 = 298992^2 + 196450^2 .

It is a super-2 number, since 2×127988818564² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 127988818564.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15998602317 + ... + 15998602324.

Almost surely, 2^127988818564 is an apocalyptic number.

It is an amenable number.

127988818564 is a deficient number, since it is larger than the sum of its proper divisors (95991613930).

127988818564 is a wasteful number, since it uses less digits than its factorization.

127988818564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31997204645 (or 31997204643 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 67.

The spelling of 127988818564 in words is "one hundred twenty-seven billion, nine hundred eighty-eight million, eight hundred eighteen thousand, five hundred sixty-four".