128271173977 has 16 divisors (see below), whose sum is σ = 129962714112. Its totient is φ = 126591721360.

The previous prime is 128271173971. The next prime is 128271173981. The reversal of 128271173977 is 779371172821.

It is a cyclic number.

It is not a de Polignac number, because 128271173977 - 2¹⁵ = 128271141209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128271173971) 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, 36366588 + ... + 36370114.

It is an arithmetic number, because the mean of its divisors is an integer number (8122669632).

Almost surely, 2^128271173977 is an apocalyptic number.

It is an amenable number.

128271173977 is a deficient number, since it is larger than the sum of its proper divisors (1691540135).

128271173977 is a wasteful number, since it uses less digits than its factorization.

128271173977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5108.

The product of its digits is 2074464, while the sum is 55.

The spelling of 128271173977 in words is "one hundred twenty-eight billion, two hundred seventy-one million, one hundred seventy-three thousand, nine hundred seventy-seven".