127989621027 has 12 divisors (see below), whose sum is σ = 185942534544. Its totient is φ = 84833196720.

The previous prime is 127989620999. The next prime is 127989621073. The reversal of 127989621027 is 720126989721.

127989621027 is a `hidden beast` number, since 1 + 2 + 7 + 9 + 8 + 9 + 621 + 0 + 2 + 7 = 666.

It is not a de Polignac number, because 127989621027 - 2¹⁸ = 127989358883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (127982621027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41099799 + ... + 41102912.

It is an arithmetic number, because the mean of its divisors is an integer number (15495211212).

Almost surely, 2^127989621027 is an apocalyptic number.

127989621027 is a deficient number, since it is larger than the sum of its proper divisors (57952913517).

127989621027 is a wasteful number, since it uses less digits than its factorization.

127989621027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82202890 (or 82202887 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 127989621027 in words is "one hundred twenty-seven billion, nine hundred eighty-nine million, six hundred twenty-one thousand, twenty-seven".