6428238506550 has 576 divisors, whose sum is σ = 21933926496000. Its totient is φ = 1376315297280.

The previous prime is 6428238506527. The next prime is 6428238506567. The reversal of 6428238506550 is 556058328246.

6428238506550 is a `hidden beast` number, since 6 + 4 + 2 + 8 + 2 + 3 + 85 + 0 + 6 + 550 = 666.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 111830917 + ... + 111888383.

It is an arithmetic number, because the mean of its divisors is an integer number (38079733500).

Almost surely, 2^{6428238506550} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6428238506550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10966963248000).

6428238506550 is an abundant number, since it is smaller than the sum of its proper divisors (15505687989450).

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

6428238506550 is a wasteful number, since it uses less digits than its factorization.

6428238506550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57610 (or 57592 counting only the distinct ones).

The product of its (nonzero) digits is 13824000, while the sum is 54.

The spelling of 6428238506550 in words is "six trillion, four hundred twenty-eight billion, two hundred thirty-eight million, five hundred six thousand, five hundred fifty".