161616169240 has 16 divisors (see below), whose sum is σ = 363636380880. Its totient is φ = 64646467680.

The previous prime is 161616169223. The next prime is 161616169243. The reversal of 161616169240 is 42961616161.

It is a super-2 number, since 2×161616169240² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161616169243) by changing a digit.

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, 2020202076 + ... + 2020202155.

It is an arithmetic number, because the mean of its divisors is an integer number (22727273805).

Almost surely, 2^161616169240 is an apocalyptic number.

161616169240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161616169240 is an abundant number, since it is smaller than the sum of its proper divisors (202020211640).

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

161616169240 is a wasteful number, since it uses less digits than its factorization.

161616169240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040404242 (or 4040404238 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 161616169240 in words is "one hundred sixty-one billion, six hundred sixteen million, one hundred sixty-nine thousand, two hundred forty".