1685168433540 has 72 divisors (see below), whose sum is σ = 5111788264128. Its totient is φ = 449368518720.

The previous prime is 1685168433479. The next prime is 1685168433583. The reversal of 1685168433540 is 453348615861.

It is a happy number.

1685168433540 is a `hidden beast` number, since 1 + 6 + 8 + 5 + 1 + 68 + 4 + 33 + 540 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12745009 + ... + 12876551.

It is an arithmetic number, because the mean of its divisors is an integer number (70997059224).

Almost surely, 2^{1685168433540} is an apocalyptic number.

1685168433540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1685168433540 is an abundant number, since it is smaller than the sum of its proper divisors (3426619830588).

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

1685168433540 is a wasteful number, since it uses less digits than its factorization.

1685168433540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202729 (or 202724 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 1685168433540 in words is "one trillion, six hundred eighty-five billion, one hundred sixty-eight million, four hundred thirty-three thousand, five hundred forty".