161583960523 has 2 divisors, whose sum is σ = 161583960524. Its totient is φ = 161583960522.

The previous prime is 161583960511. The next prime is 161583960667. The reversal of 161583960523 is 325069385161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161583960523 - 2¹³ = 161583952331 is a prime.

It is a super-2 number, since 2×161583960523² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161583960023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80791980261 + 80791980262.

It is an arithmetic number, because the mean of its divisors is an integer number (80791980262).

Almost surely, 2^161583960523 is an apocalyptic number.

161583960523 is a deficient number, since it is larger than the sum of its proper divisors (1).

161583960523 is an equidigital number, since it uses as much as digits as its factorization.

161583960523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1166400, while the sum is 49.

The spelling of 161583960523 in words is "one hundred sixty-one billion, five hundred eighty-three million, nine hundred sixty thousand, five hundred twenty-three".