4129781872 has 40 divisors (see below), whose sum is σ = 8043235200. Its totient is φ = 2054142912.

The previous prime is 4129781869. The next prime is 4129781891. The reversal of 4129781872 is 2781879214.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3279579 + ... + 3280837.

It is an arithmetic number, because the mean of its divisors is an integer number (201080880).

Almost surely, 2^4129781872 is an apocalyptic number.

It is an amenable number.

4129781872 is a deficient number, since it is larger than the sum of its proper divisors (3913453328).

4129781872 is a wasteful number, since it uses less digits than its factorization.

4129781872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2173 (or 2167 counting only the distinct ones).

The product of its digits is 451584, while the sum is 49.

The square root of 4129781872 is about 64263.3789338843. The cubic root of 4129781872 is about 1604.3866436077.

The spelling of 4129781872 in words is "four billion, one hundred twenty-nine million, seven hundred eighty-one thousand, eight hundred seventy-two".