161801231353 has 2 divisors, whose sum is σ = 161801231354. Its totient is φ = 161801231352.

The previous prime is 161801231321. The next prime is 161801231359. The reversal of 161801231353 is 353132108161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136517687289 + 25283544064 = 369483^2 + 159008^2 .

It is a cyclic number.

It is not a de Polignac number, because 161801231353 - 2⁵ = 161801231321 is a prime.

It is not a weakly prime, because it can be changed into another prime (161801231359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80900615676 + 80900615677.

It is an arithmetic number, because the mean of its divisors is an integer number (80900615677).

Almost surely, 2^161801231353 is an apocalyptic number.

It is an amenable number.

161801231353 is a deficient number, since it is larger than the sum of its proper divisors (1).

161801231353 is an equidigital number, since it uses as much as digits as its factorization.

161801231353 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 161801231353 in words is "one hundred sixty-one billion, eight hundred one million, two hundred thirty-one thousand, three hundred fifty-three".