545861518020 has 1440 divisors, whose sum is σ = 2379394684800. Its totient is φ = 102690975744.

The previous prime is 545861518009. The next prime is 545861518031. The reversal of 545861518020 is 20815168545.

545861518020 is a `hidden beast` number, since 5 + 4 + 5 + 8 + 615 + 1 + 8 + 0 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (545861518009) and next prime (545861518031).

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 479 ways as a sum of consecutive naturals, for example, 28729553571 + ... + 28729553589.

It is an arithmetic number, because the mean of its divisors is an integer number (1652357420).

Almost surely, 2^545861518020 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 545861518020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1189697342400).

545861518020 is an abundant number, since it is smaller than the sum of its proper divisors (1833533166780).

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

545861518020 is a wasteful number, since it uses less digits than its factorization.

545861518020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 66 counting only the distinct ones).

The product of its (nonzero) digits is 384000, while the sum is 45.

The spelling of 545861518020 in words is "five hundred forty-five billion, eight hundred sixty-one million, five hundred eighteen thousand, twenty".