161551562 has 16 divisors (see below), whose sum is σ = 248778432. Its totient is φ = 78634080.

The previous prime is 161551543. The next prime is 161551567. The reversal of 161551562 is 265155161.

It is not an unprimeable number, because it can be changed into a prime (161551567) 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, 41003 + ... + 44769.

It is an arithmetic number, because the mean of its divisors is an integer number (15548652).

Almost surely, 2^161551562 is an apocalyptic number.

161551562 is a deficient number, since it is larger than the sum of its proper divisors (87226870).

161551562 is a wasteful number, since it uses less digits than its factorization.

161551562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4333.

The product of its digits is 9000, while the sum is 32.

The square root of 161551562 is about 12710.2935449973. The cubic root of 161551562 is about 544.6327093500.

The spelling of 161551562 in words is "one hundred sixty-one million, five hundred fifty-one thousand, five hundred sixty-two".