1685143073930 has 16 divisors (see below), whose sum is σ = 3050790816744. Its totient is φ = 670160944320.

The previous prime is 1685143073899. The next prime is 1685143073951. The reversal of 1685143073930 is 393703415861.

It can be written as a sum of positive squares in 4 ways, for example, as 1665372183049 + 19770890881 = 1290493^2 + 140609^2 .

It is a super-2 number, since 2×1685143073930² (a number of 25 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487033841 + ... + 487037300.

Almost surely, 2^{1685143073930} is an apocalyptic number.

1685143073930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1685143073930 is a deficient number, since it is larger than the sum of its proper divisors (1365647742814).

1685143073930 is a wasteful number, since it uses less digits than its factorization.

1685143073930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974071321.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 1685143073930 in words is "one trillion, six hundred eighty-five billion, one hundred forty-three million, seventy-three thousand, nine hundred thirty".