1686161376 has 36 divisors (see below), whose sum is σ = 4795022232. Its totient is φ = 562053696.

The previous prime is 1686161369. The next prime is 1686161383. The reversal of 1686161376 is 6731616861.

1686161376 is a `hidden beast` number, since 16 + 8 + 616 + 13 + 7 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1686161369) and next prime (1686161383).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2927076 + ... + 2927651.

It is an arithmetic number, because the mean of its divisors is an integer number (133195062).

Almost surely, 2^1686161376 is an apocalyptic number.

1686161376 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1686161376 is an abundant number, since it is smaller than the sum of its proper divisors (3108860856).

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

1686161376 is a wasteful number, since it uses less digits than its factorization.

1686161376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5854743 (or 5854732 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 1686161376 is about 41062.8953679596. The cubic root of 1686161376 is about 1190.2359007884.

The spelling of 1686161376 in words is "one billion, six hundred eighty-six million, one hundred sixty-one thousand, three hundred seventy-six".