128177328774 has 64 divisors (see below), whose sum is σ = 292904501760. Its totient is φ = 37014616320.

The previous prime is 128177328749. The next prime is 128177328779. The reversal of 128177328774 is 477823771821.

It is a super-2 number, since 2×128177328774² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128177328779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251394 + ... + 565290.

It is an arithmetic number, because the mean of its divisors is an integer number (4576632840).

Almost surely, 2^128177328774 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128177328774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146452250880).

128177328774 is an abundant number, since it is smaller than the sum of its proper divisors (164727172986).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128177328774 is a wasteful number, since it uses less digits than its factorization.

128177328774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314205.

The product of its digits is 7375872, while the sum is 57.

The spelling of 128177328774 in words is "one hundred twenty-eight billion, one hundred seventy-seven million, three hundred twenty-eight thousand, seven hundred seventy-four".