161369280 has 224 divisors, whose sum is σ = 599846400. Its totient is φ = 40725504.

The previous prime is 161369279. The next prime is 161369281. The reversal of 161369280 is 82963161.

161369280 is a `hidden beast` number, since 16 + 1 + 369 + 280 = 666.

It is an interprime number because it is at equal distance from previous prime (161369279) and next prime (161369281).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (161369281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 163669 + ... + 164651.

Almost surely, 2^161369280 is an apocalyptic number.

161369280 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 161369280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299923200).

161369280 is an abundant number, since it is smaller than the sum of its proper divisors (438477120).

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

161369280 is a wasteful number, since it uses less digits than its factorization.

161369280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1028 (or 1012 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 161369280 is about 12703.1208763831. The cubic root of 161369280 is about 544.4277921080.

The spelling of 161369280 in words is "one hundred sixty-one million, three hundred sixty-nine thousand, two hundred eighty".