1679358565661 has 6 divisors (see below), whose sum is σ = 1953539556030. Its totient is φ = 1439450199096.

The previous prime is 1679358565657. The next prime is 1679358565681. The reversal of 1679358565661 is 1665658539761.

It can be written as a sum of positive squares in only one way, i.e., 1217204692900 + 462153872761 = 1103270^2 + 679819^2 .

It is not a de Polignac number, because 1679358565661 - 2² = 1679358565657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1679358565591 and 1679358565600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679358565681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17136311846 + ... + 17136311943.

It is an arithmetic number, because the mean of its divisors is an integer number (325589926005).

Almost surely, 2^{1679358565661} is an apocalyptic number.

It is an amenable number.

1679358565661 is a deficient number, since it is larger than the sum of its proper divisors (274180990369).

1679358565661 is an equidigital number, since it uses as much as digits as its factorization.

1679358565661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34272623803 (or 34272623796 counting only the distinct ones).

The product of its digits is 244944000, while the sum is 68.

The spelling of 1679358565661 in words is "one trillion, six hundred seventy-nine billion, three hundred fifty-eight million, five hundred sixty-five thousand, six hundred sixty-one".