163545629881 has 4 divisors (see below), whose sum is σ = 163935954000. Its totient is φ = 163155305764.

The previous prime is 163545629743. The next prime is 163545629893. The reversal of 163545629881 is 188926545361.

It is a happy number.

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: 188926545361 = 41 ⋅4607964521.

It is a cyclic number.

It is not a de Polignac number, because 163545629881 - 2²¹ = 163543532729 is a prime.

It is a super-2 number, since 2×163545629881² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163545629981) 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, 195161431 + ... + 195162268.

It is an arithmetic number, because the mean of its divisors is an integer number (40983988500).

Almost surely, 2^163545629881 is an apocalyptic number.

It is an amenable number.

163545629881 is a deficient number, since it is larger than the sum of its proper divisors (390324119).

163545629881 is an equidigital number, since it uses as much as digits as its factorization.

163545629881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390324118.

The product of its digits is 12441600, while the sum is 58.

The spelling of 163545629881 in words is "one hundred sixty-three billion, five hundred forty-five million, six hundred twenty-nine thousand, eight hundred eighty-one".