161506630 has 16 divisors (see below), whose sum is σ = 307812960. Its totient is φ = 60802432.

The previous prime is 161506627. The next prime is 161506633. The reversal of 161506630 is 36605161.

It is an interprime number because it is at equal distance from previous prime (161506627) and next prime (161506633).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161506633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 474850 + ... + 475189.

It is an arithmetic number, because the mean of its divisors is an integer number (19238310).

Almost surely, 2^161506630 is an apocalyptic number.

161506630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161506630 is a deficient number, since it is larger than the sum of its proper divisors (146306330).

161506630 is a wasteful number, since it uses less digits than its factorization.

161506630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950063.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 161506630 is about 12708.5258783228. The cubic root of 161506630 is about 544.5822121472.

The spelling of 161506630 in words is "one hundred sixty-one million, five hundred six thousand, six hundred thirty".