163952640989 has 2 divisors, whose sum is σ = 163952640990. Its totient is φ = 163952640988.

The previous prime is 163952640967. The next prime is 163952641003. The reversal of 163952640989 is 989046259361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85641096025 + 78311544964 = 292645^2 + 279842^2 .

It is a cyclic number.

It is not a de Polignac number, because 163952640989 - 2¹² = 163952636893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163952640919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81976320494 + 81976320495.

It is an arithmetic number, because the mean of its divisors is an integer number (81976320495).

Almost surely, 2^163952640989 is an apocalyptic number.

It is an amenable number.

163952640989 is a deficient number, since it is larger than the sum of its proper divisors (1).

163952640989 is an equidigital number, since it uses as much as digits as its factorization.

163952640989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25194240, while the sum is 62.

The spelling of 163952640989 in words is "one hundred sixty-three billion, nine hundred fifty-two million, six hundred forty thousand, nine hundred eighty-nine".