64161630 has 192 divisors, whose sum is σ = 194987520. Its totient is φ = 14515200.

The previous prime is 64161607. The next prime is 64161637. The reversal of 64161630 is 3616146.

64161630 is a `hidden beast` number, since 6 + 41 + 616 + 3 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 64161594 and 64161603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64161637) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1051800 + ... + 1051860.

It is an arithmetic number, because the mean of its divisors is an integer number (1015560).

Almost surely, 2^64161630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64161630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97493760).

64161630 is an abundant number, since it is smaller than the sum of its proper divisors (130825890).

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

64161630 is a wasteful number, since it uses less digits than its factorization.

64161630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 64161630 is about 8010.0955050486. The cubic root of 64161630 is about 400.3364460974.

Adding to 64161630 its reverse (3616146), we get a palindrome (67777776).

The spelling of 64161630 in words is "sixty-four million, one hundred sixty-one thousand, six hundred thirty".