545520868893 has 240 divisors, whose sum is σ = 1089628438080. Its totient is φ = 261409135680.

The previous prime is 545520868889. The next prime is 545520868897. The reversal of 545520868893 is 398868025545.

545520868893 is a `hidden beast` number, since 5 + 45 + 520 + 8 + 68 + 8 + 9 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (545520868889) and next prime (545520868897).

It is not a de Polignac number, because 545520868893 - 2² = 545520868889 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 545520868893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (545520868897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 373899798 + ... + 373901256.

It is an arithmetic number, because the mean of its divisors is an integer number (4540118492).

Almost surely, 2^545520868893 is an apocalyptic number.

It is an amenable number.

545520868893 is a deficient number, since it is larger than the sum of its proper divisors (544107569187).

545520868893 is a wasteful number, since it uses less digits than its factorization.

545520868893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539 (or 1493 counting only the distinct ones).

The product of its (nonzero) digits is 82944000, while the sum is 63.

The spelling of 545520868893 in words is "five hundred forty-five billion, five hundred twenty million, eight hundred sixty-eight thousand, eight hundred ninety-three".