8012978519872 has 28 divisors (see below), whose sum is σ = 16007470740900. Its totient is φ = 3979600065536.

The previous prime is 8012978519831. The next prime is 8012978519899. The reversal of 8012978519872 is 2789158792108.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 3669155574016 + 4343822945856 = 1915504^2 + 2084184^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8012978519798 and 8012978519807.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 420134053 + ... + 420153124.

Almost surely, 2^{8012978519872} is an apocalyptic number.

It is an amenable number.

8012978519872 is a deficient number, since it is larger than the sum of its proper divisors (7994492221028).

8012978519872 is a wasteful number, since it uses less digits than its factorization.

8012978519872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840287338 (or 840287328 counting only the distinct ones).

The product of its (nonzero) digits is 40642560, while the sum is 67.

The spelling of 8012978519872 in words is "eight trillion, twelve billion, nine hundred seventy-eight million, five hundred nineteen thousand, eight hundred seventy-two".