1686471380605 has 48 divisors (see below), whose sum is σ = 2350569392640. Its totient is φ = 1158346126080.

The previous prime is 1686471380597. The next prime is 1686471380639. The reversal of 1686471380605 is 5060831746861.

It is not a de Polignac number, because 1686471380605 - 2³ = 1686471380597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 332209 + ... + 1866361.

It is an arithmetic number, because the mean of its divisors is an integer number (48970195680).

Almost surely, 2^{1686471380605} is an apocalyptic number.

It is an amenable number.

1686471380605 is a deficient number, since it is larger than the sum of its proper divisors (664098012035).

1686471380605 is a wasteful number, since it uses less digits than its factorization.

1686471380605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534282 (or 1534271 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 55.

The spelling of 1686471380605 in words is "one trillion, six hundred eighty-six billion, four hundred seventy-one million, three hundred eighty thousand, six hundred five".