1686812934488 has 64 divisors (see below), whose sum is σ = 3730987008000. Its totient is φ = 706277317120.

The previous prime is 1686812934481. The next prime is 1686812934517. The reversal of 1686812934488 is 8844392186861.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686812934481) 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 in 15 ways as a sum of consecutive naturals, for example, 11924888 + ... + 12065511.

It is an arithmetic number, because the mean of its divisors is an integer number (58296672000).

Almost surely, 2^{1686812934488} is an apocalyptic number.

It is an amenable number.

1686812934488 is an abundant number, since it is smaller than the sum of its proper divisors (2044174073512).

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

1686812934488 is a wasteful number, since it uses less digits than its factorization.

1686812934488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23990480 (or 23990476 counting only the distinct ones).

The product of its digits is 127401984, while the sum is 68.

The spelling of 1686812934488 in words is "one trillion, six hundred eighty-six billion, eight hundred twelve million, nine hundred thirty-four thousand, four hundred eighty-eight".