15867622978873 has 2 divisors, whose sum is σ = 15867622978874. Its totient is φ = 15867622978872.

The previous prime is 15867622978859. The next prime is 15867622978903. The reversal of 15867622978873 is 37887922676851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10831023266704 + 5036599712169 = 3291052^2 + 2244237^2 .

It is a cyclic number.

It is not a de Polignac number, because 15867622978873 - 2⁴¹ = 13668599723321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 15867622978793 and 15867622978802.

It is not a weakly prime, because it can be changed into another prime (15867622978373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7933811489436 + 7933811489437.

It is an arithmetic number, because the mean of its divisors is an integer number (7933811489437).

Almost surely, 2^{15867622978873} is an apocalyptic number.

It is an amenable number.

15867622978873 is a deficient number, since it is larger than the sum of its proper divisors (1).

15867622978873 is an equidigital number, since it uses as much as digits as its factorization.

15867622978873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3413975040, while the sum is 79.

The spelling of 15867622978873 in words is "fifteen trillion, eight hundred sixty-seven billion, six hundred twenty-two million, nine hundred seventy-eight thousand, eight hundred seventy-three".