1685143073934 has 64 divisors (see below), whose sum is σ = 3807587400000. Its totient is φ = 552297553920.

The previous prime is 1685143073899. The next prime is 1685143073951. The reversal of 1685143073934 is 4393703415861.

1685143073934 is a `hidden beast` number, since 1 + 6 + 8 + 51 + 430 + 73 + 93 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 8762442 + ... + 8952690.

It is an arithmetic number, because the mean of its divisors is an integer number (59493553125).

Almost surely, 2^{1685143073934} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1685143073934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1903793700000).

1685143073934 is an abundant number, since it is smaller than the sum of its proper divisors (2122444326066).

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

1685143073934 is a wasteful number, since it uses less digits than its factorization.

1685143073934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193010 (or 193004 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 1685143073934 in words is "one trillion, six hundred eighty-five billion, one hundred forty-three million, seventy-three thousand, nine hundred thirty-four".