1681117820908 has 12 divisors (see below), whose sum is σ = 2952576968992. Its totient is φ = 837524401200.

The previous prime is 1681117820873. The next prime is 1681117820929. The reversal of 1681117820908 is 8090287111861.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758626068 + ... + 758628283.

Almost surely, 2^{1681117820908} is an apocalyptic number.

It is an amenable number.

1681117820908 is a deficient number, since it is larger than the sum of its proper divisors (1271459148084).

1681117820908 is a wasteful number, since it uses less digits than its factorization.

1681117820908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517254632 (or 1517254630 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 52.

The spelling of 1681117820908 in words is "one trillion, six hundred eighty-one billion, one hundred seventeen million, eight hundred twenty thousand, nine hundred eight".