161664053 has 8 divisors (see below), whose sum is σ = 163481760. Its totient is φ = 159852240.

The previous prime is 161664049. The next prime is 161664059. The reversal of 161664053 is 350466161.

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 161664053 - 2² = 161664049 is a prime.

It is a super-2 number, since 2×161664053² = 52270532064773618, 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 (161664059) 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, 74798 + ... + 76928.

It is an arithmetic number, because the mean of its divisors is an integer number (20435220).

Almost surely, 2^161664053 is an apocalyptic number.

It is an amenable number.

161664053 is a deficient number, since it is larger than the sum of its proper divisors (1817707).

161664053 is a wasteful number, since it uses less digits than its factorization.

161664053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2947.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 161664053 is about 12714.7179677726. The cubic root of 161664053 is about 544.7590922473.

The spelling of 161664053 in words is "one hundred sixty-one million, six hundred sixty-four thousand, fifty-three".