6428510885 has 4 divisors (see below), whose sum is σ = 7714213068. Its totient is φ = 5142808704.

The previous prime is 6428510861. The next prime is 6428510941. The reversal of 6428510885 is 5880158246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1192251841 + 5236259044 = 34529^2 + 72362^2 .

It is a cyclic number.

It is not a de Polignac number, because 6428510885 - 2¹⁰ = 6428509861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642851084 + ... + 642851093.

It is an arithmetic number, because the mean of its divisors is an integer number (1928553267).

Almost surely, 2^6428510885 is an apocalyptic number.

It is an amenable number.

6428510885 is a deficient number, since it is larger than the sum of its proper divisors (1285702183).

6428510885 is a wasteful number, since it uses less digits than its factorization.

6428510885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285702182.

The product of its (nonzero) digits is 614400, while the sum is 47.

The square root of 6428510885 is about 80177.9950173363. The cubic root of 6428510885 is about 1859.3884455154.

The spelling of 6428510885 in words is "six billion, four hundred twenty-eight million, five hundred ten thousand, eight hundred eighty-five".