545121664 has 32 divisors (see below), whose sum is σ = 1111251240. Its totient is φ = 266219520.

The previous prime is 545121653. The next prime is 545121683. The reversal of 545121664 is 466121545.

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 44017 + ... + 55024.

Almost surely, 2^545121664 is an apocalyptic number.

It is an amenable number.

545121664 is an abundant number, since it is smaller than the sum of its proper divisors (566129576).

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

545121664 is an equidigital number, since it uses as much as digits as its factorization.

545121664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99098 (or 99086 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 545121664 is about 23347.8406710342. The cubic root of 545121664 is about 816.8916947200.

The spelling of 545121664 in words is "five hundred forty-five million, one hundred twenty-one thousand, six hundred sixty-four".