19974937858559 has 2 divisors, whose sum is σ = 19974937858560. Its totient is φ = 19974937858558.

The previous prime is 19974937858543. The next prime is 19974937858573. The reversal of 19974937858559 is 95585873947991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19974937858559 - 2⁴ = 19974937858543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19974937855559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9987468929279 + 9987468929280.

It is an arithmetic number, because the mean of its divisors is an integer number (9987468929280).

Almost surely, 2^{19974937858559} is an apocalyptic number.

19974937858559 is a deficient number, since it is larger than the sum of its proper divisors (1).

19974937858559 is an equidigital number, since it uses as much as digits as its factorization.

19974937858559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30862944000, while the sum is 89.

The spelling of 19974937858559 in words is "nineteen trillion, nine hundred seventy-four billion, nine hundred thirty-seven million, eight hundred fifty-eight thousand, five hundred fifty-nine".