545696640 has 192 divisors, whose sum is σ = 1897506000. Its totient is φ = 144506880.

The previous prime is 545696623. The next prime is 545696653. The reversal of 545696640 is 46696545.

545696640 is a `hidden beast` number, since 545 + 6 + 9 + 66 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1215136 + ... + 1215584.

Almost surely, 2^545696640 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 545696640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948753000).

545696640 is an abundant number, since it is smaller than the sum of its proper divisors (1351809360).

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

545696640 is a wasteful number, since it uses less digits than its factorization.

545696640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685 (or 670 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The square root of 545696640 is about 23360.1506844455. The cubic root of 545696640 is about 817.1788037625.

The spelling of 545696640 in words is "five hundred forty-five million, six hundred ninety-six thousand, six hundred forty".