128291164380 has 36 divisors (see below), whose sum is σ = 389149865832. Its totient is φ = 34210977120.

The previous prime is 128291164333. The next prime is 128291164381. The reversal of 128291164380 is 83461192821.

128291164380 is a `hidden beast` number, since 1 + 28 + 2 + 91 + 164 + 380 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128291164381) 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, 356364166 + ... + 356364525.

Almost surely, 2^128291164380 is an apocalyptic number.

128291164380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128291164380 is an abundant number, since it is smaller than the sum of its proper divisors (260858701452).

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

128291164380 is a wasteful number, since it uses less digits than its factorization.

128291164380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712728706 (or 712728701 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 128291164380 in words is "one hundred twenty-eight billion, two hundred ninety-one million, one hundred sixty-four thousand, three hundred eighty".