2128908963 has 18 divisors (see below), whose sum is σ = 3017265996. Its totient is φ = 1334933568.

The previous prime is 2128908953. The next prime is 2128909043. The reversal of 2128908963 is 3698098212.

It is not a de Polignac number, because 2128908963 - 2⁵ = 2128908931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2128908953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1357806 + ... + 1359372.

Almost surely, 2^2128908963 is an apocalyptic number.

2128908963 is a deficient number, since it is larger than the sum of its proper divisors (888357033).

2128908963 is an frugal number, since it uses more digits than its factorization.

2128908963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171 (or 1587 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 2128908963 is about 46140.1014628273. The cubic root of 2128908963 is about 1286.4286296731.

Multiplying 2128908963 by its sum of digits (48), we get a square (102187630224 = 319668²).

The spelling of 2128908963 in words is "two billion, one hundred twenty-eight million, nine hundred eight thousand, nine hundred sixty-three".