8128502782 has 4 divisors (see below), whose sum is σ = 12192754176. Its totient is φ = 4064251390.

The previous prime is 8128502639. The next prime is 8128502783. The reversal of 8128502782 is 2872058218.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8128502783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2032125694 + ... + 2032125697.

It is an arithmetic number, because the mean of its divisors is an integer number (3048188544).

Almost surely, 2^8128502782 is an apocalyptic number.

8128502782 is a deficient number, since it is larger than the sum of its proper divisors (4064251394).

8128502782 is a wasteful number, since it uses less digits than its factorization.

8128502782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064251393.

The product of its (nonzero) digits is 143360, while the sum is 43.

The square root of 8128502782 is about 90158.2097315602. The cubic root of 8128502782 is about 2010.6517347286.

The spelling of 8128502782 in words is "eight billion, one hundred twenty-eight million, five hundred two thousand, seven hundred eighty-two".