161632477 has 8 divisors (see below), whose sum is σ = 168848064. Its totient is φ = 154432608.

The previous prime is 161632459. The next prime is 161632489. The reversal of 161632477 is 774236161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161632477 - 2¹¹ = 161630429 is a prime.

It is a super-2 number, since 2×161632477² = 52250115242311058, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161632417) 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, 20358 + ... + 27160.

It is an arithmetic number, because the mean of its divisors is an integer number (21106008).

Almost surely, 2^161632477 is an apocalyptic number.

It is an amenable number.

161632477 is a deficient number, since it is larger than the sum of its proper divisors (7215587).

161632477 is a wasteful number, since it uses less digits than its factorization.

161632477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7859.

The product of its digits is 42336, while the sum is 37.

The square root of 161632477 is about 12713.4761965404. The cubic root of 161632477 is about 544.7236227395.

The spelling of 161632477 in words is "one hundred sixty-one million, six hundred thirty-two thousand, four hundred seventy-seven".