1686161375 has 8 divisors (see below), whose sum is σ = 2104329552. Its totient is φ = 1348929000.

The previous prime is 1686161369. The next prime is 1686161383. The reversal of 1686161375 is 5731616861.

It is a de Polignac number, because none of the positive numbers 2^k-1686161375 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6744521 + ... + 6744770.

It is an arithmetic number, because the mean of its divisors is an integer number (263041194).

Almost surely, 2^1686161375 is an apocalyptic number.

1686161375 is a deficient number, since it is larger than the sum of its proper divisors (418168177).

1686161375 is an equidigital number, since it uses as much as digits as its factorization.

1686161375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13489306 (or 13489296 counting only the distinct ones).

The product of its digits is 181440, while the sum is 44.

The square root of 1686161375 is about 41062.8953557832. The cubic root of 1686161375 is about 1190.2359005531.

The spelling of 1686161375 in words is "one billion, six hundred eighty-six million, one hundred sixty-one thousand, three hundred seventy-five".