1686453465872 has 20 divisors (see below), whose sum is σ = 3734289817536. Its totient is φ = 722765771040.

The previous prime is 1686453465857. The next prime is 1686453465887. The reversal of 1686453465872 is 2785643546861.

It is an interprime number because it is at equal distance from previous prime (1686453465857) and next prime (1686453465887).

It is a junction number, because it is equal to n+sod(n) for n = 1686453465799 and 1686453465808.

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 3 ways as a sum of consecutive naturals, for example, 7528810004 + ... + 7528810227.

Almost surely, 2^{1686453465872} is an apocalyptic number.

It is an amenable number.

1686453465872 is an abundant number, since it is smaller than the sum of its proper divisors (2047836351664).

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

1686453465872 is a wasteful number, since it uses less digits than its factorization.

1686453465872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15057620246 (or 15057620240 counting only the distinct ones).

The product of its digits is 232243200, while the sum is 65.

The spelling of 1686453465872 in words is "one trillion, six hundred eighty-six billion, four hundred fifty-three million, four hundred sixty-five thousand, eight hundred seventy-two".