3196859887681 has 2 divisors, whose sum is σ = 3196859887682. Its totient is φ = 3196859887680.

The previous prime is 3196859887643. The next prime is 3196859887709. The reversal of 3196859887681 is 1867889586913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2438016802225 + 758843085456 = 1561415^2 + 871116^2 .

It is a cyclic number.

It is not a de Polignac number, because 3196859887681 - 2¹⁵ = 3196859854913 is a prime.

It is a super-2 number, since 2×3196859887681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3196859884681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1598429943840 + 1598429943841.

It is an arithmetic number, because the mean of its divisors is an integer number (1598429943841).

Almost surely, 2^{3196859887681} is an apocalyptic number.

It is an amenable number.

3196859887681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3196859887681 is an equidigital number, since it uses as much as digits as its factorization.

3196859887681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1254113280, while the sum is 79.

The spelling of 3196859887681 in words is "three trillion, one hundred ninety-six billion, eight hundred fifty-nine million, eight hundred eighty-seven thousand, six hundred eighty-one".