161344620 has 72 divisors (see below), whose sum is σ = 518210784. Its totient is φ = 40493568.

The previous prime is 161344607. The next prime is 161344639. The reversal of 161344620 is 26443161.

161344620 is a `hidden beast` number, since 1 + 6 + 1 + 34 + 4 + 620 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23304 + ... + 29423.

It is an arithmetic number, because the mean of its divisors is an integer number (7197372).

Almost surely, 2^161344620 is an apocalyptic number.

161344620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161344620 is an abundant number, since it is smaller than the sum of its proper divisors (356866164).

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

161344620 is a wasteful number, since it uses less digits than its factorization.

161344620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52759 (or 52754 counting only the distinct ones).

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

The square root of 161344620 is about 12702.1502116768. The cubic root of 161344620 is about 544.4000580533.

Adding to 161344620 its reverse (26443161), we get a palindrome (187787781).

The spelling of 161344620 in words is "one hundred sixty-one million, three hundred forty-four thousand, six hundred twenty".