161163804120 has 128 divisors (see below), whose sum is σ = 555205536000. Its totient is φ = 37013690880.

The previous prime is 161163804103. The next prime is 161163804127. The reversal of 161163804120 is 21408361161.

161163804120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161163804127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3187915 + ... + 3238074.

It is an arithmetic number, because the mean of its divisors is an integer number (4337543250).

Almost surely, 2^161163804120 is an apocalyptic number.

161163804120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161163804120 is an abundant number, since it is smaller than the sum of its proper divisors (394041731880).

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

161163804120 is a wasteful number, since it uses less digits than its factorization.

161163804120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6426033 (or 6426029 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The spelling of 161163804120 in words is "one hundred sixty-one billion, one hundred sixty-three million, eight hundred four thousand, one hundred twenty".