215878979167 has 2 divisors, whose sum is σ = 215878979168. Its totient is φ = 215878979166.

The previous prime is 215878979161. The next prime is 215878979189. The reversal of 215878979167 is 761979878512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215878979167 - 2¹⁵ = 215878946399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215878979096 and 215878979105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (215878979161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107939489583 + 107939489584.

It is an arithmetic number, because the mean of its divisors is an integer number (107939489584).

Almost surely, 2^215878979167 is an apocalyptic number.

215878979167 is a deficient number, since it is larger than the sum of its proper divisors (1).

215878979167 is an equidigital number, since it uses as much as digits as its factorization.

215878979167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 106686720, while the sum is 70.

The spelling of 215878979167 in words is "two hundred fifteen billion, eight hundred seventy-eight million, nine hundred seventy-nine thousand, one hundred sixty-seven".