1684878939713 has 4 divisors (see below), whose sum is σ = 1720727427840. Its totient is φ = 1649030451588.

The previous prime is 1684878939697. The next prime is 1684878939721. The reversal of 1684878939713 is 3179398784861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1684878939713 - 2⁴ = 1684878939697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1684878939763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17924243993 + ... + 17924244086.

It is an arithmetic number, because the mean of its divisors is an integer number (430181856960).

Almost surely, 2^{1684878939713} is an apocalyptic number.

It is an amenable number.

1684878939713 is a deficient number, since it is larger than the sum of its proper divisors (35848488127).

1684878939713 is an equidigital number, since it uses as much as digits as its factorization.

1684878939713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35848488126.

The product of its digits is 438939648, while the sum is 74.

The spelling of 1684878939713 in words is "one trillion, six hundred eighty-four billion, eight hundred seventy-eight million, nine hundred thirty-nine thousand, seven hundred thirteen".