1601757231161 has 2 divisors, whose sum is σ = 1601757231162. Its totient is φ = 1601757231160.

The previous prime is 1601757231157. The next prime is 1601757231209. The reversal of 1601757231161 is 1611327571061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978257486761 + 623499744400 = 989069^2 + 789620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601757231161 - 2² = 1601757231157 is a prime.

It is not a weakly prime, because it can be changed into another prime (1601757531161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 800878615580 + 800878615581.

It is an arithmetic number, because the mean of its divisors is an integer number (800878615581).

Almost surely, 2^{1601757231161} is an apocalyptic number.

It is an amenable number.

1601757231161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1601757231161 is an equidigital number, since it uses as much as digits as its factorization.

1601757231161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 41.

The spelling of 1601757231161 in words is "one trillion, six hundred one billion, seven hundred fifty-seven million, two hundred thirty-one thousand, one hundred sixty-one".