19583798957 has 2 divisors, whose sum is σ = 19583798958. Its totient is φ = 19583798956.

The previous prime is 19583798951. The next prime is 19583799007. The reversal of 19583798957 is 75989738591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10358964841 + 9224834116 = 101779^2 + 96046^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19583798957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19583798951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9791899478 + 9791899479.

It is an arithmetic number, because the mean of its divisors is an integer number (9791899479).

Almost surely, 2^19583798957 is an apocalyptic number.

It is an amenable number.

19583798957 is a deficient number, since it is larger than the sum of its proper divisors (1).

19583798957 is an equidigital number, since it uses as much as digits as its factorization.

19583798957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 171460800, while the sum is 71.

The spelling of 19583798957 in words is "nineteen billion, five hundred eighty-three million, seven hundred ninety-eight thousand, nine hundred fifty-seven".