128066942920 has 96 divisors (see below), whose sum is σ = 346754244600. Its totient is φ = 42394555392.

The previous prime is 128066942869. The next prime is 128066942933. The reversal of 128066942920 is 29249660821.

It can be written as a sum of positive squares in 4 ways, for example, as 122294286436 + 5772656484 = 349706^2 + 75978^2 .

It is a super-2 number, since 2×128066942920² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1069717 + ... + 1183396.

Almost surely, 2^128066942920 is an apocalyptic number.

128066942920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128066942920 is an abundant number, since it is smaller than the sum of its proper divisors (218687301680).

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

128066942920 is a wasteful number, since it uses less digits than its factorization.

128066942920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253167 (or 2253156 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The spelling of 128066942920 in words is "one hundred twenty-eight billion, sixty-six million, nine hundred forty-two thousand, nine hundred twenty".