161630503230 has 64 divisors (see below), whose sum is σ = 448310661120. Its totient is φ = 36529008384.

The previous prime is 161630503211. The next prime is 161630503247. The reversal of 161630503230 is 32305036161.

It is a happy number.

It is a super-2 number, since 2×161630503230² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4305294 + ... + 4342673.

It is an arithmetic number, because the mean of its divisors is an integer number (7004854080).

Almost surely, 2^161630503230 is an apocalyptic number.

161630503230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161630503230 is an abundant number, since it is smaller than the sum of its proper divisors (286680157890).

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

161630503230 is a wasteful number, since it uses less digits than its factorization.

161630503230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8648073.

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 161630503230 its reverse (32305036161), we get a palindrome (193935539391).

The spelling of 161630503230 in words is "one hundred sixty-one billion, six hundred thirty million, five hundred three thousand, two hundred thirty".