128170611690 has 128 divisors (see below), whose sum is σ = 337665024000. Its totient is φ = 30878615040.

The previous prime is 128170611689. The next prime is 128170611697. The reversal of 128170611690 is 96116071821.

128170611690 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×128170611690² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128170611697) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 47241774 + ... + 47244486.

It is an arithmetic number, because the mean of its divisors is an integer number (2638008000).

Almost surely, 2^128170611690 is an apocalyptic number.

128170611690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 128170611690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (168832512000).

128170611690 is an abundant number, since it is smaller than the sum of its proper divisors (209494412310).

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

128170611690 is a wasteful number, since it uses less digits than its factorization.

128170611690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3572.

The product of its (nonzero) digits is 36288, while the sum is 42.

The spelling of 128170611690 in words is "one hundred twenty-eight billion, one hundred seventy million, six hundred eleven thousand, six hundred ninety".