161616149352 has 48 divisors (see below), whose sum is σ = 500240463840.
Its totient is φ = 46176042528.
The previous prime is 161616149347. The next prime is 161616149381. The reversal of 161616149352 is 253941616161.
161616149352 is a `hidden beast` number, since 1 + 616 + 16 + 14 + 9 + 3 + 5 + 2 = 666.
It is a super-2 number, since 2×1616161493522 (a number of 23 digits) contains 22 as substring.
It is a junction number, because it is equal to n+sod(n) for n = 161616149298 and 161616149307.
It is an unprimeable number.
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 11 ways as a sum of consecutive naturals, for example, 160332978 + ... + 160333985.
It is an arithmetic number, because the mean of its divisors is an integer number (10421676330).
Almost surely, 2161616149352 is an apocalyptic number.
161616149352 is a gapful number since it is divisible by the number (12) formed by its first and last digit.
It is an amenable number.
161616149352 is an abundant number, since it is smaller than the sum of its proper divisors (338624314488).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
161616149352 is a wasteful number, since it uses less digits than its factorization.
161616149352 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 320666982 (or 320666975 counting only the distinct ones).
The product of its digits is 233280, while the sum is 45.
The spelling of 161616149352 in words is "one hundred sixty-one billion, six hundred sixteen million, one hundred forty-nine thousand, three hundred fifty-two".