690636642017 has 8 divisors (see below), whose sum is σ = 789384506112. Its totient is φ = 591910149600.

The previous prime is 690636641987. The next prime is 690636642041. The reversal of 690636642017 is 710246636096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 690636642017 - 2¹² = 690636637921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690636642097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5273609 + ... + 5402982.

It is an arithmetic number, because the mean of its divisors is an integer number (98673063264).

Almost surely, 2^690636642017 is an apocalyptic number.

It is an amenable number.

690636642017 is a deficient number, since it is larger than the sum of its proper divisors (98747864095).

690636642017 is a wasteful number, since it uses less digits than its factorization.

690636642017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10685839.

The product of its (nonzero) digits is 1959552, while the sum is 50.

The spelling of 690636642017 in words is "six hundred ninety billion, six hundred thirty-six million, six hundred forty-two thousand, seventeen".