163344634991 has 2 divisors, whose sum is σ = 163344634992. Its totient is φ = 163344634990.

The previous prime is 163344634949. The next prime is 163344635107. The reversal of 163344634991 is 199436443361.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 163344634991 - 2²² = 163340440687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163344630991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81672317495 + 81672317496.

It is an arithmetic number, because the mean of its divisors is an integer number (81672317496).

Almost surely, 2^163344634991 is an apocalyptic number.

163344634991 is a deficient number, since it is larger than the sum of its proper divisors (1).

163344634991 is an equidigital number, since it uses as much as digits as its factorization.

163344634991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5038848, while the sum is 53.

The spelling of 163344634991 in words is "one hundred sixty-three billion, three hundred forty-four million, six hundred thirty-four thousand, nine hundred ninety-one".