161122562619 has 4 divisors (see below), whose sum is σ = 214830083496. Its totient is φ = 107415041744.

The previous prime is 161122562609. The next prime is 161122562633. The reversal of 161122562619 is 916265221161.

It is a happy number.

161122562619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 916265221161 = 3 ⋅305421740387.

It is a cyclic number.

It is not a de Polignac number, because 161122562619 - 2¹² = 161122558523 is a prime.

It is a super-2 number, since 2×161122562619² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161122562609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26853760434 + ... + 26853760439.

It is an arithmetic number, because the mean of its divisors is an integer number (53707520874).

Almost surely, 2^161122562619 is an apocalyptic number.

161122562619 is a deficient number, since it is larger than the sum of its proper divisors (53707520877).

161122562619 is an equidigital number, since it uses as much as digits as its factorization.

161122562619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53707520876.

The product of its digits is 77760, while the sum is 42.

The spelling of 161122562619 in words is "one hundred sixty-one billion, one hundred twenty-two million, five hundred sixty-two thousand, six hundred nineteen".