161651064 has 32 divisors (see below), whose sum is σ = 409248000. Its totient is φ = 53200992.

The previous prime is 161651059. The next prime is 161651093. The reversal of 161651064 is 460156161.

It is a super-2 number, since 2×161651064² = 52262132984664192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 40734 + ... + 44525.

It is an arithmetic number, because the mean of its divisors is an integer number (12789000).

Almost surely, 2^161651064 is an apocalyptic number.

It is an amenable number.

161651064 is an abundant number, since it is smaller than the sum of its proper divisors (247596936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161651064 is a wasteful number, since it uses less digits than its factorization.

161651064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85347 (or 85343 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 161651064 is about 12714.2071715070. The cubic root of 161651064 is about 544.7445021859.

The spelling of 161651064 in words is "one hundred sixty-one million, six hundred fifty-one thousand, sixty-four".