163991839541 has 8 divisors (see below), whose sum is σ = 164083246080. Its totient is φ = 163900466352.

The previous prime is 163991839513. The next prime is 163991839553. The reversal of 163991839541 is 145938199361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163991839541 - 2¹⁴ = 163991823157 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 (163991839591) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25850816 + ... + 25857158.

It is an arithmetic number, because the mean of its divisors is an integer number (20510405760).

Almost surely, 2^163991839541 is an apocalyptic number.

It is an amenable number.

163991839541 is a deficient number, since it is larger than the sum of its proper divisors (91406539).

163991839541 is an equidigital number, since it uses as much as digits as its factorization.

163991839541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16675.

The product of its digits is 6298560, while the sum is 59.

The spelling of 163991839541 in words is "one hundred sixty-three billion, nine hundred ninety-one million, eight hundred thirty-nine thousand, five hundred forty-one".