1685693845377 has 6 divisors (see below), whose sum is σ = 2434891110002. Its totient is φ = 1123795896912.

The previous prime is 1685693845361. The next prime is 1685693845399. The reversal of 1685693845377 is 7735483965861.

It is a happy number.

1685693845377 is a `hidden beast` number, since 1 + 6 + 8 + 5 + 6 + 9 + 3 + 84 + 537 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1015507660176 + 670186185201 = 1007724^2 + 818649^2 .

It is not a de Polignac number, because 1685693845377 - 2⁴ = 1685693845361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1685693844377) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 93649658068 + ... + 93649658085.

Almost surely, 2^{1685693845377} is an apocalyptic number.

It is an amenable number.

1685693845377 is a deficient number, since it is larger than the sum of its proper divisors (749197264625).

1685693845377 is a wasteful number, since it uses less digits than its factorization.

1685693845377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187299316159 (or 187299316156 counting only the distinct ones).

The product of its digits is 914457600, while the sum is 72.

The spelling of 1685693845377 in words is "one trillion, six hundred eighty-five billion, six hundred ninety-three million, eight hundred forty-five thousand, three hundred seventy-seven".