1975646465791 has 2 divisors, whose sum is σ = 1975646465792. Its totient is φ = 1975646465790.

The previous prime is 1975646465777. The next prime is 1975646465801.

1975646465791 is nontrivially palindromic in base 10.

It is a strong prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 1975646465791 - 2¹¹ = 1975646463743 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1975646465791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1975646465731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987823232895 + 987823232896.

It is an arithmetic number, because the mean of its divisors is an integer number (987823232896).

Almost surely, 2^{1975646465791} is an apocalyptic number.

1975646465791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975646465791 is an equidigital number, since it uses as much as digits as its factorization.

1975646465791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 342921600, while the sum is 70.

The spelling of 1975646465791 in words is "one trillion, nine hundred seventy-five billion, six hundred forty-six million, four hundred sixty-five thousand, seven hundred ninety-one".