161944630 has 16 divisors (see below), whose sum is σ = 296280144. Its totient is φ = 63715680.

The previous prime is 161944621. The next prime is 161944639. The reversal of 161944630 is 36449161.

It is an interprime number because it is at equal distance from previous prime (161944621) and next prime (161944639).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161944639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132132 + ... + 133351.

It is an arithmetic number, because the mean of its divisors is an integer number (18517509).

Almost surely, 2^161944630 is an apocalyptic number.

161944630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161944630 is a deficient number, since it is larger than the sum of its proper divisors (134335514).

161944630 is a wasteful number, since it uses less digits than its factorization.

161944630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265551.

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 161944630 is about 12725.7467364395. The cubic root of 161944630 is about 545.0740633852.

The spelling of 161944630 in words is "one hundred sixty-one million, nine hundred forty-four thousand, six hundred thirty".