128990835883 has 16 divisors (see below), whose sum is σ = 162450002176. Its totient is φ = 99685222560.

The previous prime is 128990835833. The next prime is 128990835913. The reversal of 128990835883 is 388538099821.

It is not a de Polignac number, because 128990835883 - 2¹⁷ = 128990704811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128990835803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16478433 + ... + 16486258.

It is an arithmetic number, because the mean of its divisors is an integer number (10153125136).

Almost surely, 2^128990835883 is an apocalyptic number.

128990835883 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128990835883 is a deficient number, since it is larger than the sum of its proper divisors (33459166293).

128990835883 is a wasteful number, since it uses less digits than its factorization.

128990835883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32964754.

The product of its (nonzero) digits is 29859840, while the sum is 64.

The spelling of 128990835883 in words is "one hundred twenty-eight billion, nine hundred ninety million, eight hundred thirty-five thousand, eight hundred eighty-three".