1693131806728 has 32 divisors (see below), whose sum is σ = 3249895160160. Its totient is φ = 826510608000.

The previous prime is 1693131806713. The next prime is 1693131806741. The reversal of 1693131806728 is 8276081313961.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 318925 + ... + 1867612.

It is an arithmetic number, because the mean of its divisors is an integer number (101559223755).

Almost surely, 2^{1693131806728} is an apocalyptic number.

It is an amenable number.

1693131806728 is a deficient number, since it is larger than the sum of its proper divisors (1556763353432).

1693131806728 is a wasteful number, since it uses less digits than its factorization.

1693131806728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188837 (or 2188833 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 1693131806728 in words is "one trillion, six hundred ninety-three billion, one hundred thirty-one million, eight hundred six thousand, seven hundred twenty-eight".