1686471380625 has 20 divisors (see below), whose sum is σ = 2809886186096. Its totient is φ = 899451402000.

The previous prime is 1686471380597. The next prime is 1686471380639. The reversal of 1686471380625 is 5260831746861.

It is not a de Polignac number, because 1686471380625 - 2¹¹ = 1686471378577 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 449723827 + ... + 449727576.

Almost surely, 2^{1686471380625} is an apocalyptic number.

1686471380625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1686471380625 is a deficient number, since it is larger than the sum of its proper divisors (1123414805471).

1686471380625 is an frugal number, since it uses more digits than its factorization.

1686471380625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899451426 (or 899451411 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 57.

The spelling of 1686471380625 in words is "one trillion, six hundred eighty-six billion, four hundred seventy-one million, three hundred eighty thousand, six hundred twenty-five".