5451243100020 has 144 divisors (see below), whose sum is σ = 17434691426880. Its totient is φ = 1374864192000.

The previous prime is 5451243099979. The next prime is 5451243100031. The reversal of 5451243100020 is 200013421545.

5451243100020 is a `hidden beast` number, since 5 + 4 + 512 + 43 + 100 + 0 + 2 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 729355 + ... + 3381485.

It is an arithmetic number, because the mean of its divisors is an integer number (121074246020).

Almost surely, 2^{5451243100020} 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 5451243100020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8717345713440).

5451243100020 is an abundant number, since it is smaller than the sum of its proper divisors (11983448326860).

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

5451243100020 is a wasteful number, since it uses less digits than its factorization.

5451243100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652766 (or 2652761 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 5451243100020 its reverse (200013421545), we get a palindrome (5651256521565).

The spelling of 5451243100020 in words is "five trillion, four hundred fifty-one billion, two hundred forty-three million, one hundred thousand, twenty".