161340630 has 128 divisors (see below), whose sum is σ = 456606720. Its totient is φ = 36072960.

The previous prime is 161340611. The next prime is 161340649. The reversal of 161340630 is 36043161.

It is an interprime number because it is at equal distance from previous prime (161340611) and next prime (161340649).

It is a self number, because there is not a number n which added to its sum of digits gives 161340630.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 219744 + ... + 220476.

It is an arithmetic number, because the mean of its divisors is an integer number (3567240).

Almost surely, 2^161340630 is an apocalyptic number.

161340630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161340630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228303360).

161340630 is an abundant number, since it is smaller than the sum of its proper divisors (295266090).

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

161340630 is a wasteful number, since it uses less digits than its factorization.

161340630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 806.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 161340630 is about 12701.9931506831. The cubic root of 161340630 is about 544.3955704041.

Adding to 161340630 its reverse (36043161), we get a palindrome (197383791).

The spelling of 161340630 in words is "one hundred sixty-one million, three hundred forty thousand, six hundred thirty".