128083389066850 has 72 divisors (see below), whose sum is σ = 277231456804500. Its totient is φ = 43898327867520.

The previous prime is 128083389066821. The next prime is 128083389066889. The reversal of 128083389066850 is 58660983380821.

It can be written as a sum of positive squares in 6 ways, for example, as 14953170826489 + 113130218240361 = 3866933^2 + 10636269^2 .

It is a super-2 number, since 2×128083389066850² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2773669 + ... + 16243768.

Almost surely, 2^{128083389066850} is an apocalyptic number.

128083389066850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128083389066850 is an abundant number, since it is smaller than the sum of its proper divisors (149148067737650).

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

128083389066850 is a wasteful number, since it uses less digits than its factorization.

128083389066850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19020212 (or 19020200 counting only the distinct ones).

The product of its (nonzero) digits is 119439360, while the sum is 67.

The spelling of 128083389066850 in words is "one hundred twenty-eight trillion, eighty-three billion, three hundred eighty-nine million, sixty-six thousand, eight hundred fifty".