163934442641 has 4 divisors (see below), whose sum is σ = 165225265152. Its totient is φ = 162643620132.

The previous prime is 163934442541. The next prime is 163934442643. The reversal of 163934442641 is 146244439361.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 146244439361 = 1103 ⋅132587887.

It is a cyclic number.

It is not a de Polignac number, because 163934442641 - 2³⁰ = 162860700817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163934442643) 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, 645411065 + ... + 645411318.

It is an arithmetic number, because the mean of its divisors is an integer number (41306316288).

Almost surely, 2^163934442641 is an apocalyptic number.

It is an amenable number.

163934442641 is a deficient number, since it is larger than the sum of its proper divisors (1290822511).

163934442641 is a wasteful number, since it uses less digits than its factorization.

163934442641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290822510.

The product of its digits is 1492992, while the sum is 47.

The spelling of 163934442641 in words is "one hundred sixty-three billion, nine hundred thirty-four million, four hundred forty-two thousand, six hundred forty-one".