1693810638106 has 4 divisors (see below), whose sum is σ = 2540715957162. Its totient is φ = 846905319052.

The previous prime is 1693810638043. The next prime is 1693810638109. The reversal of 1693810638106 is 6018360183961.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1216134756225 + 477675881881 = 1102785^2 + 691141^2 .

It is a super-2 number, since 2×1693810638106² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1693810638109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423452659525 + ... + 423452659528.

Almost surely, 2^{1693810638106} is an apocalyptic number.

1693810638106 is a deficient number, since it is larger than the sum of its proper divisors (846905319056).

1693810638106 is an equidigital number, since it uses as much as digits as its factorization.

1693810638106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 846905319055.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 1693810638106 in words is "one trillion, six hundred ninety-three billion, eight hundred ten million, six hundred thirty-eight thousand, one hundred six".