163068947749 has 4 divisors (see below), whose sum is σ = 163479701164. Its totient is φ = 162658194336.

The previous prime is 163068947677. The next prime is 163068947791. The reversal of 163068947749 is 947749860361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 98828496900 + 64240450849 = 314370^2 + 253457^2 .

It is a cyclic number.

It is not a de Polignac number, because 163068947749 - 2⁷ = 163068947621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163068942749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205376112 + ... + 205376905.

It is an arithmetic number, because the mean of its divisors is an integer number (40869925291).

Almost surely, 2^163068947749 is an apocalyptic number.

It is an amenable number.

163068947749 is a deficient number, since it is larger than the sum of its proper divisors (410753415).

163068947749 is an equidigital number, since it uses as much as digits as its factorization.

163068947749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410753414.

The product of its (nonzero) digits is 54867456, while the sum is 64.

The spelling of 163068947749 in words is "one hundred sixty-three billion, sixty-eight million, nine hundred forty-seven thousand, seven hundred forty-nine".