161854005536 has 24 divisors (see below), whose sum is σ = 321743769984. Its totient is φ = 80141302080.

The previous prime is 161854005529. The next prime is 161854005539. The reversal of 161854005536 is 635500458161.

It is not an unprimeable number, because it can be changed into a prime (161854005539) 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, 24549800 + ... + 24556391.

It is an arithmetic number, because the mean of its divisors is an integer number (13405990416).

Almost surely, 2^161854005536 is an apocalyptic number.

161854005536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161854005536 is a deficient number, since it is larger than the sum of its proper divisors (159889764448).

161854005536 is a wasteful number, since it uses less digits than its factorization.

161854005536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49106304 (or 49106296 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 161854005536 in words is "one hundred sixty-one billion, eight hundred fifty-four million, five thousand, five hundred thirty-six".