156424066649989 has 2 divisors, whose sum is σ = 156424066649990. Its totient is φ = 156424066649988.

The previous prime is 156424066649969. The next prime is 156424066650013. The reversal of 156424066649989 is 989946660424651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141392123468964 + 15031943181025 = 11890842^2 + 3877105^2 .

It is an emirp because it is prime and its reverse (989946660424651) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 156424066649989 - 2³⁷ = 156286627696517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156424066649969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78212033324994 + 78212033324995.

It is an arithmetic number, because the mean of its divisors is an integer number (78212033324995).

Almost surely, 2^{156424066649989} is an apocalyptic number.

It is an amenable number.

156424066649989 is a deficient number, since it is larger than the sum of its proper divisors (1).

156424066649989 is an equidigital number, since it uses as much as digits as its factorization.

156424066649989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4837294080, while the sum is 79.

The spelling of 156424066649989 in words is "one hundred fifty-six trillion, four hundred twenty-four billion, sixty-six million, six hundred forty-nine thousand, nine hundred eighty-nine".