161045164 has 72 divisors (see below), whose sum is σ = 343874160. Its totient is φ = 65729664.

The previous prime is 161045113. The next prime is 161045167. The reversal of 161045164 is 461540161.

161045164 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 (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161045167) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 384147 + ... + 384565.

It is an arithmetic number, because the mean of its divisors is an integer number (4776030).

Almost surely, 2^161045164 is an apocalyptic number.

161045164 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161045164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171937080).

161045164 is an abundant number, since it is smaller than the sum of its proper divisors (182828996).

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

161045164 is a wasteful number, since it uses less digits than its factorization.

161045164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527 (or 518 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 161045164 is about 12690.3571265745. The cubic root of 161045164 is about 544.0630468668.

The spelling of 161045164 in words is "one hundred sixty-one million, forty-five thousand, one hundred sixty-four".