1680897625613 has 2 divisors, whose sum is σ = 1680897625614. Its totient is φ = 1680897625612.

The previous prime is 1680897625489. The next prime is 1680897625633. The reversal of 1680897625613 is 3165267980861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 855230995369 + 825666630244 = 924787^2 + 908662^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680897625613 - 2¹⁴ = 1680897609229 is a prime.

It is a super-2 number, since 2×1680897625613² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680897625633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840448812806 + 840448812807.

It is an arithmetic number, because the mean of its divisors is an integer number (840448812807).

Almost surely, 2^{1680897625613} is an apocalyptic number.

It is an amenable number.

1680897625613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680897625613 is an equidigital number, since it uses as much as digits as its factorization.

1680897625613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26127360, while the sum is 62.

The spelling of 1680897625613 in words is "one trillion, six hundred eighty billion, eight hundred ninety-seven million, six hundred twenty-five thousand, six hundred thirteen".