5621473394640 has 640 divisors, whose sum is σ = 20816524800000. Its totient is φ = 1391206440960.

The previous prime is 5621473394597. The next prime is 5621473394657. The reversal of 5621473394640 is 464933741265.

5621473394640 is a `hidden beast` number, since 5 + 6 + 2 + 147 + 3 + 39 + 464 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 289324446 + ... + 289343874.

It is an arithmetic number, because the mean of its divisors is an integer number (32525820000).

Almost surely, 2^{5621473394640} 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 5621473394640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10408262400000).

5621473394640 is an abundant number, since it is smaller than the sum of its proper divisors (15195051405360).

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

5621473394640 is a wasteful number, since it uses less digits than its factorization.

5621473394640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19660 (or 19648 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 54.

The spelling of 5621473394640 in words is "five trillion, six hundred twenty-one billion, four hundred seventy-three million, three hundred ninety-four thousand, six hundred forty".