161612426 has 4 divisors (see below), whose sum is σ = 242418642. Its totient is φ = 80806212.

The previous prime is 161612417. The next prime is 161612441. The reversal of 161612426 is 624216161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 161315401 + 297025 = 12701^2 + 545^2 .

It is a super-2 number, since 2×161612426² = 52237152475210952, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40403105 + ... + 40403108.

Almost surely, 2^161612426 is an apocalyptic number.

161612426 is a deficient number, since it is larger than the sum of its proper divisors (80806216).

161612426 is an equidigital number, since it uses as much as digits as its factorization.

161612426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80806215.

The product of its digits is 3456, while the sum is 29.

The square root of 161612426 is about 12712.6875994024. The cubic root of 161612426 is about 544.7010969344.

Adding to 161612426 its reverse (624216161), we get a palindrome (785828587).

The spelling of 161612426 in words is "one hundred sixty-one million, six hundred twelve thousand, four hundred twenty-six".