1686124961 has 8 divisors (see below), whose sum is σ = 1775791200. Its totient is φ = 1596551040.

The previous prime is 1686124919. The next prime is 1686124967. The reversal of 1686124961 is 1694216861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1686124961 - 2³⁰ = 612383137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1686124967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16145 + ... + 60273.

It is an arithmetic number, because the mean of its divisors is an integer number (221973900).

Almost surely, 2^1686124961 is an apocalyptic number.

It is an amenable number.

1686124961 is a deficient number, since it is larger than the sum of its proper divisors (89666239).

1686124961 is a wasteful number, since it uses less digits than its factorization.

1686124961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46159.

The product of its digits is 124416, while the sum is 44.

The square root of 1686124961 is about 41062.4519603981. The cubic root of 1686124961 is about 1190.2273324602.

The spelling of 1686124961 in words is "one billion, six hundred eighty-six million, one hundred twenty-four thousand, nine hundred sixty-one".