161632534 has 8 divisors (see below), whose sum is σ = 277084368. Its totient is φ = 69271080.

The previous prime is 161632507. The next prime is 161632553. The reversal of 161632534 is 435236161.

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

It is a super-2 number, since 2×161632534² = 52250152094522312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161632496 and 161632505.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5772577 + ... + 5772604.

It is an arithmetic number, because the mean of its divisors is an integer number (34635546).

Almost surely, 2^161632534 is an apocalyptic number.

161632534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

161632534 is a deficient number, since it is larger than the sum of its proper divisors (115451834).

161632534 is a wasteful number, since it uses less digits than its factorization.

161632534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11545190.

The product of its digits is 12960, while the sum is 31.

The square root of 161632534 is about 12713.4784382560. The cubic root of 161632534 is about 544.7236867721.

Adding to 161632534 its reverse (435236161), we get a palindrome (596868695).

The spelling of 161632534 in words is "one hundred sixty-one million, six hundred thirty-two thousand, five hundred thirty-four".