1619117808797 has 2 divisors, whose sum is σ = 1619117808798. Its totient is φ = 1619117808796.

The previous prime is 1619117808761. The next prime is 1619117808827. The reversal of 1619117808797 is 7978087119161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1010770847641 + 608346961156 = 1005371^2 + 779966^2 .

It is a cyclic number.

It is not a de Polignac number, because 1619117808797 - 2⁸ = 1619117808541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1619117808727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809558904398 + 809558904399.

It is an arithmetic number, because the mean of its divisors is an integer number (809558904399).

Almost surely, 2^{1619117808797} is an apocalyptic number.

It is an amenable number.

1619117808797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1619117808797 is an equidigital number, since it uses as much as digits as its factorization.

1619117808797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10668672, while the sum is 65.

The spelling of 1619117808797 in words is "one trillion, six hundred nineteen billion, one hundred seventeen million, eight hundred eight thousand, seven hundred ninety-seven".