1686940850976 has 48 divisors (see below), whose sum is σ = 4477975034400. Its totient is φ = 555995483648.

The previous prime is 1686940850857. The next prime is 1686940850977. The reversal of 1686940850976 is 6790580496861.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (69) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1686940850976.

It is not an unprimeable number, because it can be changed into a prime (1686940850977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 98712246 + ... + 98729333.

It is an arithmetic number, because the mean of its divisors is an integer number (93291146550).

Almost surely, 2^{1686940850976} is an apocalyptic number.

1686940850976 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1686940850976 is an abundant number, since it is smaller than the sum of its proper divisors (2791034183424).

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

1686940850976 is a wasteful number, since it uses less digits than its factorization.

1686940850976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197441681 (or 197441673 counting only the distinct ones).

The product of its (nonzero) digits is 156764160, while the sum is 69.

The spelling of 1686940850976 in words is "one trillion, six hundred eighty-six billion, nine hundred forty million, eight hundred fifty thousand, nine hundred seventy-six".