15797474278393 has 2 divisors, whose sum is σ = 15797474278394. Its totient is φ = 15797474278392.

The previous prime is 15797474278367. The next prime is 15797474278429. The reversal of 15797474278393 is 39387247479751.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15768586857024 + 28887421369 = 3970968^2 + 169963^2 .

It is a cyclic number.

It is not a de Polignac number, because 15797474278393 - 2⁴¹ = 13598451022841 is a prime.

It is not a weakly prime, because it can be changed into another prime (15797474278363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7898737139196 + 7898737139197.

It is an arithmetic number, because the mean of its divisors is an integer number (7898737139197).

Almost surely, 2^{15797474278393} is an apocalyptic number.

It is an amenable number.

15797474278393 is a deficient number, since it is larger than the sum of its proper divisors (1).

15797474278393 is an equidigital number, since it uses as much as digits as its factorization.

15797474278393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240421120, while the sum is 76.

The spelling of 15797474278393 in words is "fifteen trillion, seven hundred ninety-seven billion, four hundred seventy-four million, two hundred seventy-eight thousand, three hundred ninety-three".