128123062320 has 160 divisors (see below), whose sum is σ = 433522324224. Its totient is φ = 31043404800.

The previous prime is 128123062307. The next prime is 128123062391. The reversal of 128123062320 is 23260321821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5296974 + ... + 5321106.

Almost surely, 2^128123062320 is an apocalyptic number.

128123062320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128123062320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216761162112).

128123062320 is an abundant number, since it is smaller than the sum of its proper divisors (305399261904).

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

128123062320 is a wasteful number, since it uses less digits than its factorization.

128123062320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26171 (or 26165 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The spelling of 128123062320 in words is "one hundred twenty-eight billion, one hundred twenty-three million, sixty-two thousand, three hundred twenty".