1685765314388 has 6 divisors (see below), whose sum is σ = 2950089300186. Its totient is φ = 842882657192.

The previous prime is 1685765314379. The next prime is 1685765314399. The reversal of 1685765314388 is 8834135675861.

It can be written as a sum of positive squares in only one way, i.e., 1679854472464 + 5910841924 = 1296092^2 + 76882^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210720664295 + ... + 210720664302.

It is an arithmetic number, because the mean of its divisors is an integer number (491681550031).

Almost surely, 2^{1685765314388} is an apocalyptic number.

It is an amenable number.

1685765314388 is a deficient number, since it is larger than the sum of its proper divisors (1264323985798).

1685765314388 is a wasteful number, since it uses less digits than its factorization.

1685765314388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421441328601 (or 421441328599 counting only the distinct ones).

The product of its digits is 116121600, while the sum is 65.

The spelling of 1685765314388 in words is "one trillion, six hundred eighty-five billion, seven hundred sixty-five million, three hundred fourteen thousand, three hundred eighty-eight".