1685940495861 has 32 divisors (see below), whose sum is σ = 2303142145920. Its totient is φ = 1096680904704.

The previous prime is 1685940495829. The next prime is 1685940495917.

It is a happy number.

1685940495861 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1685940495861 - 2⁵ = 1685940495829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1685940495792 and 1685940495801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1685940475861) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36522151 + ... + 36568283.

It is an arithmetic number, because the mean of its divisors is an integer number (71973192060).

Almost surely, 2^{1685940495861} is an apocalyptic number.

It is an amenable number.

1685940495861 is a deficient number, since it is larger than the sum of its proper divisors (617201650059).

1685940495861 is a wasteful number, since it uses less digits than its factorization.

1685940495861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47925.

The product of its (nonzero) digits is 74649600, while the sum is 66.

The spelling of 1685940495861 in words is "one trillion, six hundred eighty-five billion, nine hundred forty million, four hundred ninety-five thousand, eight hundred sixty-one".