2978313713866 has 4 divisors (see below), whose sum is σ = 4467470570802. Its totient is φ = 1489156856932.

The previous prime is 2978313713863. The next prime is 2978313713873. The reversal of 2978313713866 is 6683173138792.

2978313713866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 2681501225841 + 296812488025 = 1637529^2 + 544805^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2978313713798 and 2978313713807.

It is not an unprimeable number, because it can be changed into a prime (2978313713863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744578428465 + ... + 744578428468.

Almost surely, 2^{2978313713866} is an apocalyptic number.

2978313713866 is a deficient number, since it is larger than the sum of its proper divisors (1489156856936).

2978313713866 is a wasteful number, since it uses less digits than its factorization.

2978313713866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489156856935.

The product of its digits is 54867456, while the sum is 64.

The spelling of 2978313713866 in words is "two trillion, nine hundred seventy-eight billion, three hundred thirteen million, seven hundred thirteen thousand, eight hundred sixty-six".