127811668 has 6 divisors (see below), whose sum is σ = 223670426. Its totient is φ = 63905832.

The previous prime is 127811639. The next prime is 127811681. The reversal of 127811668 is 866118721.

It can be written as a sum of positive squares in only one way, i.e., 123698884 + 4112784 = 11122^2 + 2028^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 127811668.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15976455 + ... + 15976462.

Almost surely, 2^127811668 is an apocalyptic number.

It is an amenable number.

127811668 is a deficient number, since it is larger than the sum of its proper divisors (95858758).

127811668 is a wasteful number, since it uses less digits than its factorization.

127811668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31952921 (or 31952919 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 127811668 is about 11305.3822580221. The cubic root of 127811668 is about 503.7211283730.

The spelling of 127811668 in words is "one hundred twenty-seven million, eight hundred eleven thousand, six hundred sixty-eight".