1684986389450 has 96 divisors (see below), whose sum is σ = 3893373558144. Its totient is φ = 528286429440.

The previous prime is 1684986389417. The next prime is 1684986389479. The reversal of 1684986389450 is 549836894861.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1243649 + ... + 2217348.

It is an arithmetic number, because the mean of its divisors is an integer number (40555974564).

Almost surely, 2^{1684986389450} is an apocalyptic number.

1684986389450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1684986389450 is an abundant number, since it is smaller than the sum of its proper divisors (2208387168694).

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

1684986389450 is a wasteful number, since it uses less digits than its factorization.

1684986389450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3461136 (or 3461131 counting only the distinct ones).

The product of its (nonzero) digits is 358318080, while the sum is 71.

The spelling of 1684986389450 in words is "one trillion, six hundred eighty-four billion, nine hundred eighty-six million, three hundred eighty-nine thousand, four hundred fifty".