1685606125816 has 16 divisors (see below), whose sum is σ = 3163870173240. Its totient is φ = 841907412960.

The previous prime is 1685606125811. The next prime is 1685606125817. The reversal of 1685606125816 is 6185216065861.

It is a happy number.

It is a super-2 number, since 2×1685606125816² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685606125811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111948246 + ... + 111963301.

Almost surely, 2^{1685606125816} is an apocalyptic number.

It is an amenable number.

1685606125816 is a deficient number, since it is larger than the sum of its proper divisors (1478264047424).

1685606125816 is a wasteful number, since it uses less digits than its factorization.

1685606125816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223912494 (or 223912490 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 55.

The spelling of 1685606125816 in words is "one trillion, six hundred eighty-five billion, six hundred six million, one hundred twenty-five thousand, eight hundred sixteen".