1686161363 has 4 divisors (see below), whose sum is σ = 1686257880. Its totient is φ = 1686064848.

The previous prime is 1686161353. The next prime is 1686161369. The reversal of 1686161363 is 3631616861.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1686161363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1686161363.

It is not an unprimeable number, because it can be changed into a prime (1686161369) 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, 13898 + ... + 59711.

It is an arithmetic number, because the mean of its divisors is an integer number (421564470).

Almost surely, 2^1686161363 is an apocalyptic number.

1686161363 is a deficient number, since it is larger than the sum of its proper divisors (96517).

1686161363 is an equidigital number, since it uses as much as digits as its factorization.

1686161363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96516.

The product of its digits is 93312, while the sum is 41.

The square root of 1686161363 is about 41062.8952096659. The cubic root of 1686161363 is about 1190.2358977295.

The spelling of 1686161363 in words is "one billion, six hundred eighty-six million, one hundred sixty-one thousand, three hundred sixty-three".