2143078864 has 10 divisors (see below), whose sum is σ = 4152215330. Its totient is φ = 1071539424.

The previous prime is 2143078853. The next prime is 2143078877. The reversal of 2143078864 is 4688703412.

It can be written as a sum of positive squares in only one way, i.e., 2142949264 + 129600 = 46292^2 + 360^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2143078864.

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 as a sum of consecutive naturals, namely, 66971199 + ... + 66971230.

It is an arithmetic number, because the mean of its divisors is an integer number (415221533).

Almost surely, 2^2143078864 is an apocalyptic number.

It is an amenable number.

2143078864 is a deficient number, since it is larger than the sum of its proper divisors (2009136466).

2143078864 is a wasteful number, since it uses less digits than its factorization.

2143078864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133942437 (or 133942431 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 2143078864 is about 46293.3997887388. The cubic root of 2143078864 is about 1289.2764534098.

The spelling of 2143078864 in words is "two billion, one hundred forty-three million, seventy-eight thousand, eight hundred sixty-four".