545840664 has 72 divisors (see below), whose sum is σ = 1445963580. Its totient is φ = 171684000.

The previous prime is 545840651. The next prime is 545840699. The reversal of 545840664 is 466048545.

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 17 ways as a sum of consecutive naturals, for example, 2174539 + ... + 2174789.

Almost surely, 2^545840664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 545840664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722981790).

545840664 is an abundant number, since it is smaller than the sum of its proper divisors (900122916).

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

545840664 is a wasteful number, since it uses less digits than its factorization.

545840664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The square root of 545840664 is about 23363.2331666660. The cubic root of 545840664 is about 817.2506892503.

The spelling of 545840664 in words is "five hundred forty-five million, eight hundred forty thousand, six hundred sixty-four".