161840832544771 has 16 divisors (see below), whose sum is σ = 164710252958400. Its totient is φ = 158987841062400.

The previous prime is 161840832544669. The next prime is 161840832544799. The reversal of 161840832544771 is 177445238048161.

It is a cyclic number.

It is not a de Polignac number, because 161840832544771 - 2⁴⁷ = 21103344189443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161840832344771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 622121695 + ... + 622381783.

It is an arithmetic number, because the mean of its divisors is an integer number (10294390809900).

Almost surely, 2^{161840832544771} is an apocalyptic number.

161840832544771 is a deficient number, since it is larger than the sum of its proper divisors (2869420413629).

161840832544771 is a wasteful number, since it uses less digits than its factorization.

161840832544771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291630.

The product of its (nonzero) digits is 36126720, while the sum is 61.

The spelling of 161840832544771 in words is "one hundred sixty-one trillion, eight hundred forty billion, eight hundred thirty-two million, five hundred forty-four thousand, seven hundred seventy-one".