128008080040 has 16 divisors (see below), whose sum is σ = 288018180180. Its totient is φ = 51203232000.

The previous prime is 128008080001. The next prime is 128008080091. The reversal of 128008080040 is 40080800821.

It can be written as a sum of positive squares in 2 ways, for example, as 103360964004 + 24647116036 = 321498^2 + 156994^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128008079984 and 128008080011.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1600100961 + ... + 1600101040.

Almost surely, 2^128008080040 is an apocalyptic number.

128008080040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128008080040 is an abundant number, since it is smaller than the sum of its proper divisors (160010100140).

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

128008080040 is a wasteful number, since it uses less digits than its factorization.

128008080040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200202012 (or 3200202008 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 31.

Adding to 128008080040 its reverse (40080800821), we get a palindrome (168088880861).

The spelling of 128008080040 in words is "one hundred twenty-eight billion, eight million, eighty thousand, forty".