128901685970 has 16 divisors (see below), whose sum is σ = 232027225920. Its totient is φ = 51559743024.

The previous prime is 128901685951. The next prime is 128901686009. The reversal of 128901685970 is 79586109821.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835499 + ... + 977681.

It is an arithmetic number, because the mean of its divisors is an integer number (14501701620).

Almost surely, 2^128901685970 is an apocalyptic number.

128901685970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128901685970 is a deficient number, since it is larger than the sum of its proper divisors (103125539950).

128901685970 is a wasteful number, since it uses less digits than its factorization.

128901685970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232849.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 128901685970 in words is "one hundred twenty-eight billion, nine hundred one million, six hundred eighty-five thousand, nine hundred seventy".