161913426 has 8 divisors (see below), whose sum is σ = 323826864. Its totient is φ = 53971140.

The previous prime is 161913419. The next prime is 161913431. The reversal of 161913426 is 624319161.

It is a sphenic number, since it is the product of 3 distinct primes.

161913426 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13492780 + ... + 13492791.

It is an arithmetic number, because the mean of its divisors is an integer number (40478358).

Almost surely, 2^161913426 is an apocalyptic number.

161913426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161913426 is a wasteful number, since it uses less digits than its factorization.

161913426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26985576.

The product of its digits is 7776, while the sum is 33.

The square root of 161913426 is about 12724.5206589482. The cubic root of 161913426 is about 545.0390522755.

The spelling of 161913426 in words is "one hundred sixty-one million, nine hundred thirteen thousand, four hundred twenty-six".