1686161364 has 12 divisors (see below), whose sum is σ = 3934376544. Its totient is φ = 562053784.

The previous prime is 1686161353. The next prime is 1686161369. The reversal of 1686161364 is 4631616861.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686161369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70256712 + ... + 70256735.

It is an arithmetic number, because the mean of its divisors is an integer number (327864712).

Almost surely, 2^1686161364 is an apocalyptic number.

It is an amenable number.

1686161364 is an abundant number, since it is smaller than the sum of its proper divisors (2248215180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1686161364 is a wasteful number, since it uses less digits than its factorization.

1686161364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140513454 (or 140513452 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 1686161364 is about 41062.8952218423. The cubic root of 1686161364 is about 1190.2358979648.

The spelling of 1686161364 in words is "one billion, six hundred eighty-six million, one hundred sixty-one thousand, three hundred sixty-four".