6887513812 has 6 divisors (see below), whose sum is σ = 12053149178. Its totient is φ = 3443756904.

The previous prime is 6887513767. The next prime is 6887513837. The reversal of 6887513812 is 2183157886.

It can be written as a sum of positive squares in only one way, i.e., 6765720516 + 121793296 = 82254^2 + 11036^2 .

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 as a sum of consecutive naturals, namely, 860939223 + ... + 860939230.

Almost surely, 2^6887513812 is an apocalyptic number.

It is an amenable number.

6887513812 is a deficient number, since it is larger than the sum of its proper divisors (5165635366).

6887513812 is a wasteful number, since it uses less digits than its factorization.

6887513812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721878457 (or 1721878455 counting only the distinct ones).

The product of its digits is 645120, while the sum is 49.

The square root of 6887513812 is about 82991.0465773266. The cubic root of 6887513812 is about 1902.6292143165.

The spelling of 6887513812 in words is "six billion, eight hundred eighty-seven million, five hundred thirteen thousand, eight hundred twelve".