161226924097 has 4 divisors (see below), whose sum is σ = 163038462660. Its totient is φ = 159415385536.

The previous prime is 161226924017. The next prime is 161226924101. The reversal of 161226924097 is 790429622161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 790429622161 = 307 ⋅2574689323.

It can be written as a sum of positive squares in 2 ways, for example, as 68422003776 + 92804920321 = 261576^2 + 304639^2 .

It is a cyclic number.

It is not a de Polignac number, because 161226924097 - 2⁷ = 161226923969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161226924097.

It is not an unprimeable number, because it can be changed into a prime (161226924017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905769148 + ... + 905769325.

It is an arithmetic number, because the mean of its divisors is an integer number (40759615665).

Almost surely, 2^161226924097 is an apocalyptic number.

It is an amenable number.

161226924097 is a deficient number, since it is larger than the sum of its proper divisors (1811538563).

161226924097 is an equidigital number, since it uses as much as digits as its factorization.

161226924097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811538562.

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 161226924097 in words is "one hundred sixty-one billion, two hundred twenty-six million, nine hundred twenty-four thousand, ninety-seven".