128869379973690 has 128 divisors (see below), whose sum is σ = 312184971521280. Its totient is φ = 34044052224000.

The previous prime is 128869379973683. The next prime is 128869379973701. The reversal of 128869379973690 is 96379973968821.

It is a super-2 number, since 2×128869379973690² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128869379973597 and 128869379973606.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15584634876 + ... + 15584643144.

It is an arithmetic number, because the mean of its divisors is an integer number (2438945090010).

Almost surely, 2^{128869379973690} is an apocalyptic number.

128869379973690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128869379973690 is an abundant number, since it is smaller than the sum of its proper divisors (183315591547590).

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

128869379973690 is a wasteful number, since it uses less digits than its factorization.

128869379973690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14768.

The product of its (nonzero) digits is 13332791808, while the sum is 87.

The spelling of 128869379973690 in words is "one hundred twenty-eight trillion, eight hundred sixty-nine billion, three hundred seventy-nine million, nine hundred seventy-three thousand, six hundred ninety".