643282549470 has 192 divisors, whose sum is σ = 1936167577344. Its totient is φ = 152320331520.

The previous prime is 643282549451. The next prime is 643282549471. The reversal of 643282549470 is 74945282346.

It is a happy number.

643282549470 is a `hidden beast` number, since 6 + 4 + 3 + 2 + 82 + 5 + 494 + 70 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643282549471) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 869554 + ... + 1429226.

It is an arithmetic number, because the mean of its divisors is an integer number (10084206132).

Almost surely, 2^643282549470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643282549470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (968083788672).

643282549470 is an abundant number, since it is smaller than the sum of its proper divisors (1292885027874).

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

643282549470 is a wasteful number, since it uses less digits than its factorization.

643282549470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559749 (or 559737 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 54.

The spelling of 643282549470 in words is "six hundred forty-three billion, two hundred eighty-two million, five hundred forty-nine thousand, four hundred seventy".