6128459781 has 16 divisors (see below), whose sum is σ = 8439889920. Its totient is φ = 3951491760.

The previous prime is 6128459773. The next prime is 6128459797. The reversal of 6128459781 is 1879548216.

It is not a de Polignac number, because 6128459781 - 2³ = 6128459773 is a prime.

It is a super-2 number, since 2×6128459781² = 75116038574669135922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6128459731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144856 + ... + 182318.

It is an arithmetic number, because the mean of its divisors is an integer number (527493120).

Almost surely, 2^6128459781 is an apocalyptic number.

It is an amenable number.

6128459781 is a deficient number, since it is larger than the sum of its proper divisors (2311430139).

6128459781 is a wasteful number, since it uses less digits than its factorization.

6128459781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39256.

The product of its digits is 967680, while the sum is 51.

The square root of 6128459781 is about 78284.4798219928. The cubic root of 6128459781 is about 1829.9972907482.

The spelling of 6128459781 in words is "six billion, one hundred twenty-eight million, four hundred fifty-nine thousand, seven hundred eighty-one".