161464320 has 240 divisors, whose sum is σ = 581941920. Its totient is φ = 42467328.

The previous prime is 161464313. The next prime is 161464321. The reversal of 161464320 is 23464161.

161464320 is a `hidden beast` number, since 1 + 6 + 14 + 643 + 2 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161464321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2211804 + ... + 2211876.

It is an arithmetic number, because the mean of its divisors is an integer number (2424758).

Almost surely, 2^161464320 is an apocalyptic number.

161464320 is a gapful number since it is divisible by the number (10) 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 161464320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290970960).

161464320 is an abundant number, since it is smaller than the sum of its proper divisors (420477600).

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

161464320 is an frugal number, since it uses more digits than its factorization.

161464320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 161464320 is about 12706.8611387707. The cubic root of 161464320 is about 544.5346531384.

The spelling of 161464320 in words is "one hundred sixty-one million, four hundred sixty-four thousand, three hundred twenty".