19457163797 has 2 divisors, whose sum is σ = 19457163798. Its totient is φ = 19457163796.

The previous prime is 19457163787. The next prime is 19457163829. The reversal of 19457163797 is 79736175491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14321148241 + 5136015556 = 119671^2 + 71666^2 .

It is a cyclic number.

It is not a de Polignac number, because 19457163797 - 2²⁸ = 19188728341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19457163707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9728581898 + 9728581899.

It is an arithmetic number, because the mean of its divisors is an integer number (9728581899).

Almost surely, 2^19457163797 is an apocalyptic number.

It is an amenable number.

19457163797 is a deficient number, since it is larger than the sum of its proper divisors (1).

19457163797 is an equidigital number, since it uses as much as digits as its factorization.

19457163797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10001880, while the sum is 59.

The spelling of 19457163797 in words is "nineteen billion, four hundred fifty-seven million, one hundred sixty-three thousand, seven hundred ninety-seven".