161644559514 has 8 divisors (see below), whose sum is σ = 323289119040. Its totient is φ = 53881519836.

The previous prime is 161644559477. The next prime is 161644559519. The reversal of 161644559514 is 415955446161.

161644559514 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

161644559514 is an admirable number.

It is a super-2 number, since 2×161644559514² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161644559519) 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, 13470379954 + ... + 13470379965.

It is an arithmetic number, because the mean of its divisors is an integer number (40411139880).

Almost surely, 2^161644559514 is an apocalyptic number.

161644559514 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.

161644559514 is a wasteful number, since it uses less digits than its factorization.

161644559514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26940759924.

The product of its digits is 2592000, while the sum is 51.

The spelling of 161644559514 in words is "one hundred sixty-one billion, six hundred forty-four million, five hundred fifty-nine thousand, five hundred fourteen".