5478994663920 has 960 divisors, whose sum is σ = 20666873485440. Its totient is φ = 1294368768000.

The previous prime is 5478994663873. The next prime is 5478994663979. The reversal of 5478994663920 is 293664998745.

5478994663920 is a `hidden beast` number, since 5 + 4 + 78 + 9 + 9 + 466 + 3 + 92 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2402013180 + ... + 2402015460.

It is an arithmetic number, because the mean of its divisors is an integer number (21527993214).

Almost surely, 2^{5478994663920} 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 5478994663920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10333436742720).

5478994663920 is an abundant number, since it is smaller than the sum of its proper divisors (15187878821520).

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

5478994663920 is a wasteful number, since it uses less digits than its factorization.

5478994663920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2514 (or 2505 counting only the distinct ones).

The product of its (nonzero) digits is 705438720, while the sum is 72.

The spelling of 5478994663920 in words is "five trillion, four hundred seventy-eight billion, nine hundred ninety-four million, six hundred sixty-three thousand, nine hundred twenty".