1684378956107 has 2 divisors, whose sum is σ = 1684378956108. Its totient is φ = 1684378956106.

The previous prime is 1684378956097. The next prime is 1684378956181. The reversal of 1684378956107 is 7016598734861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1684378956107 - 2⁸ = 1684378955851 is a prime.

It is a super-2 number, since 2×1684378956107² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1684378956187) by changing a digit.

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, 842189478053 + 842189478054.

It is an arithmetic number, because the mean of its divisors is an integer number (842189478054).

Almost surely, 2^{1684378956107} is an apocalyptic number.

1684378956107 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684378956107 is an equidigital number, since it uses as much as digits as its factorization.

1684378956107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60963840, while the sum is 65.

The spelling of 1684378956107 in words is "one trillion, six hundred eighty-four billion, three hundred seventy-eight million, nine hundred fifty-six thousand, one hundred seven".