1686505428706 has 32 divisors (see below), whose sum is σ = 2984566975488. Its totient is φ = 699436710720.

The previous prime is 1686505428667. The next prime is 1686505428733. The reversal of 1686505428706 is 6078245056861.

It is a happy number.

It is a super-2 number, since 2×1686505428706² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9517936 + ... + 9693508.

It is an arithmetic number, because the mean of its divisors is an integer number (93267717984).

Almost surely, 2^{1686505428706} is an apocalyptic number.

1686505428706 is a deficient number, since it is larger than the sum of its proper divisors (1298061546782).

1686505428706 is a wasteful number, since it uses less digits than its factorization.

1686505428706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197746.

The product of its (nonzero) digits is 19353600, while the sum is 58.

The spelling of 1686505428706 in words is "one trillion, six hundred eighty-six billion, five hundred five million, four hundred twenty-eight thousand, seven hundred six".