161553355308 has 60 divisors (see below), whose sum is σ = 422920380960. Its totient is φ = 53776143648.

The previous prime is 161553355297. The next prime is 161553355309. The reversal of 161553355308 is 803553355161.

161553355308 is a `hidden beast` number, since 1 + 6 + 1 + 5 + 5 + 335 + 5 + 308 = 666.

It is a super-2 number, since 2×161553355308² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161553355309) 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 19 ways as a sum of consecutive naturals, for example, 113791 + ... + 579702.

It is an arithmetic number, because the mean of its divisors is an integer number (7048673016).

Almost surely, 2^161553355308 is an apocalyptic number.

161553355308 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

161553355308 is an abundant number, since it is smaller than the sum of its proper divisors (261367025652).

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

161553355308 is a wasteful number, since it uses less digits than its factorization.

161553355308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694228 (or 694217 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 161553355308 in words is "one hundred sixty-one billion, five hundred fifty-three million, three hundred fifty-five thousand, three hundred eight".