161506629 has 20 divisors (see below), whose sum is σ = 244179936. Its totient is φ = 106369416.

The previous prime is 161506627. The next prime is 161506633. The reversal of 161506629 is 926605161.

161506629 is a `hidden beast` number, since 16 + 15 + 0 + 6 + 629 = 666.

It is not a de Polignac number, because 161506629 - 2¹ = 161506627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161506593 and 161506602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161506627) 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 19 ways as a sum of consecutive naturals, for example, 5289 + ... + 18734.

Almost surely, 2^161506629 is an apocalyptic number.

It is an amenable number.

161506629 is a deficient number, since it is larger than the sum of its proper divisors (82673307).

161506629 is an equidigital number, since it uses as much as digits as its factorization.

161506629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24118 (or 24109 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 161506629 is about 12708.5258389791. The cubic root of 161506629 is about 544.5822110233.

The spelling of 161506629 in words is "one hundred sixty-one million, five hundred six thousand, six hundred twenty-nine".