1686874774458 has 32 divisors (see below), whose sum is σ = 3421984389120. Its totient is φ = 554304824640.

The previous prime is 1686874774433. The next prime is 1686874774469. The reversal of 1686874774458 is 8544774786861.

It is a self number, because there is not a number n which added to its sum of digits gives 1686874774458.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 6417658 + ... + 6675333.

It is an arithmetic number, because the mean of its divisors is an integer number (106937012160).

Almost surely, 2^{1686874774458} is an apocalyptic number.

1686874774458 is an abundant number, since it is smaller than the sum of its proper divisors (1735109614662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1686874774458 is a wasteful number, since it uses less digits than its factorization.

1686874774458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13093302.

The product of its digits is 2023096320, while the sum is 75.

The spelling of 1686874774458 in words is "one trillion, six hundred eighty-six billion, eight hundred seventy-four million, seven hundred seventy-four thousand, four hundred fifty-eight".