127478989784 has 8 divisors (see below), whose sum is σ = 239023105860. Its totient is φ = 63739494888.

The previous prime is 127478989783. The next prime is 127478989801. The reversal of 127478989784 is 487989874721.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127478989783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7967436854 + ... + 7967436869.

Almost surely, 2^127478989784 is an apocalyptic number.

It is an amenable number.

127478989784 is a deficient number, since it is larger than the sum of its proper divisors (111544116076).

127478989784 is a wasteful number, since it uses less digits than its factorization.

127478989784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15934873729 (or 15934873725 counting only the distinct ones).

The product of its digits is 455196672, while the sum is 74.

The spelling of 127478989784 in words is "one hundred twenty-seven billion, four hundred seventy-eight million, nine hundred eighty-nine thousand, seven hundred eighty-four".