1681777696808 has 16 divisors (see below), whose sum is σ = 3439999834560. Its totient is φ = 764444407600.

The previous prime is 1681777696801. The next prime is 1681777696811. The reversal of 1681777696808 is 8086967771861.

It is not an unprimeable number, because it can be changed into a prime (1681777696801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9555555008 + ... + 9555555183.

It is an arithmetic number, because the mean of its divisors is an integer number (214999989660).

Almost surely, 2^{1681777696808} is an apocalyptic number.

It is an amenable number.

1681777696808 is an abundant number, since it is smaller than the sum of its proper divisors (1758222137752).

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

1681777696808 is a wasteful number, since it uses less digits than its factorization.

1681777696808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19111110208 (or 19111110204 counting only the distinct ones).

The product of its (nonzero) digits is 341397504, while the sum is 74.

The spelling of 1681777696808 in words is "one trillion, six hundred eighty-one billion, seven hundred seventy-seven million, six hundred ninety-six thousand, eight hundred eight".