167278983936989 has 2 divisors, whose sum is σ = 167278983936990. Its totient is φ = 167278983936988.

The previous prime is 167278983936973. The next prime is 167278983937027. The reversal of 167278983936989 is 989639389872761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84749662697764 + 82529321239225 = 9205958^2 + 9084565^2 .

It is a cyclic number.

It is not a de Polignac number, because 167278983936989 - 2⁴ = 167278983936973 is a prime.

It is a super-2 number, since 2×167278983936989² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (167278983936289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83639491968494 + 83639491968495.

It is an arithmetic number, because the mean of its divisors is an integer number (83639491968495).

Almost surely, 2^{167278983936989} is an apocalyptic number.

It is an amenable number.

167278983936989 is a deficient number, since it is larger than the sum of its proper divisors (1).

167278983936989 is an equidigital number, since it uses as much as digits as its factorization.

167278983936989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 106662334464, while the sum is 95.

The spelling of 167278983936989 in words is "one hundred sixty-seven trillion, two hundred seventy-eight billion, nine hundred eighty-three million, nine hundred thirty-six thousand, nine hundred eighty-nine".