161738048811 has 4 divisors (see below), whose sum is σ = 215650731752. Its totient is φ = 107825365872.

The previous prime is 161738048749. The next prime is 161738048827. The reversal of 161738048811 is 118840837161.

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

It is not a de Polignac number, because 161738048811 - 2⁹ = 161738048299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161738048851) 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, 26956341466 + ... + 26956341471.

It is an arithmetic number, because the mean of its divisors is an integer number (53912682938).

Almost surely, 2^161738048811 is an apocalyptic number.

161738048811 is a deficient number, since it is larger than the sum of its proper divisors (53912682941).

161738048811 is an equidigital number, since it uses as much as digits as its factorization.

161738048811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53912682940.

The product of its (nonzero) digits is 258048, while the sum is 48.

The spelling of 161738048811 in words is "one hundred sixty-one billion, seven hundred thirty-eight million, forty-eight thousand, eight hundred eleven".