128259012090 has 96 divisors (see below), whose sum is σ = 356720894784. Its totient is φ = 29264066560.

The previous prime is 128259012083. The next prime is 128259012113. The reversal of 128259012090 is 90210952821.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 577059 + ... + 767798.

It is an arithmetic number, because the mean of its divisors is an integer number (3715842654).

Almost surely, 2^128259012090 is an apocalyptic number.

128259012090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128259012090 is an abundant number, since it is smaller than the sum of its proper divisors (228461882694).

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

128259012090 is a wasteful number, since it uses less digits than its factorization.

128259012090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344912 (or 1344895 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The spelling of 128259012090 in words is "one hundred twenty-eight billion, two hundred fifty-nine million, twelve thousand, ninety".