15805193864959 has 2 divisors, whose sum is σ = 15805193864960. Its totient is φ = 15805193864958.

The previous prime is 15805193864953. The next prime is 15805193865023. The reversal of 15805193864959 is 95946839150851.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15805193864959 - 2¹⁵ = 15805193832191 is a prime.

It is a super-2 number, since 2×15805193864959² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 15805193864891 and 15805193864900.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15805193864953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7902596932479 + 7902596932480.

It is an arithmetic number, because the mean of its divisors is an integer number (7902596932480).

Almost surely, 2^{15805193864959} is an apocalyptic number.

15805193864959 is a deficient number, since it is larger than the sum of its proper divisors (1).

15805193864959 is an equidigital number, since it uses as much as digits as its factorization.

15805193864959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 419904000, while the sum is 73.

The spelling of 15805193864959 in words is "fifteen trillion, eight hundred five billion, one hundred ninety-three million, eight hundred sixty-four thousand, nine hundred fifty-nine".