1631646350797 has 2 divisors, whose sum is σ = 1631646350798. Its totient is φ = 1631646350796.

The previous prime is 1631646350771. The next prime is 1631646350809. The reversal of 1631646350797 is 7970536461361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1510885930761 + 120760420036 = 1229181^2 + 347506^2 .

It is a cyclic number.

It is not a de Polignac number, because 1631646350797 - 2³⁵ = 1597286612429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1631646350297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815823175398 + 815823175399.

It is an arithmetic number, because the mean of its divisors is an integer number (815823175399).

Almost surely, 2^{1631646350797} is an apocalyptic number.

It is an amenable number.

1631646350797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1631646350797 is an equidigital number, since it uses as much as digits as its factorization.

1631646350797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17146080, while the sum is 58.

The spelling of 1631646350797 in words is "one trillion, six hundred thirty-one billion, six hundred forty-six million, three hundred fifty thousand, seven hundred ninety-seven".