3646697771791 has 2 divisors, whose sum is σ = 3646697771792. Its totient is φ = 3646697771790.

The previous prime is 3646697771723. The next prime is 3646697771867. The reversal of 3646697771791 is 1971777966463.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3646697771791 - 2²⁵ = 3646664217359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3646697771291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1823348885895 + 1823348885896.

It is an arithmetic number, because the mean of its divisors is an integer number (1823348885896).

Almost surely, 2^{3646697771791} is an apocalyptic number.

3646697771791 is a deficient number, since it is larger than the sum of its proper divisors (1).

3646697771791 is an equidigital number, since it uses as much as digits as its factorization.

3646697771791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504094752, while the sum is 73.

The spelling of 3646697771791 in words is "three trillion, six hundred forty-six billion, six hundred ninety-seven million, seven hundred seventy-one thousand, seven hundred ninety-one".