161226318964800 has 84 divisors (see below), whose sum is σ = 528956681486096. Its totient is φ = 42993685056000.

The previous prime is 161226318964751. The next prime is 161226318964801. The reversal of 161226318964800 is 8469813622161.

It is not an unprimeable number, because it can be changed into a prime (161226318964801) 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 11 ways as a sum of consecutive naturals, for example, 16794403426 + ... + 16794413025.

Almost surely, 2^{161226318964800} is an apocalyptic number.

161226318964800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161226318964800 is an abundant number, since it is smaller than the sum of its proper divisors (367730362521296).

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

161226318964800 is a wasteful number, since it uses less digits than its factorization.

161226318964800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33588816476 (or 33588816461 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 161226318964800 in words is "one hundred sixty-one trillion, two hundred twenty-six billion, three hundred eighteen million, nine hundred sixty-four thousand, eight hundred".