643192347497472 has 132 divisors (see below), whose sum is σ = 1896718924067136. Its totient is φ = 209835801169920.

The previous prime is 643192347497471. The next prime is 643192347497477. The reversal of 643192347497472 is 274794743291346.

643192347497472 is a `hidden beast` number, since 6 + 4 + 3 + 1 + 9 + 23 + 47 + 4 + 97 + 472 = 666.

It is a super-4 number, since 4×643192347497472⁴ (a number of 60 digits) contains 4444 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 643192347497472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643192347497471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 742022554 + ... + 742888857.

Almost surely, 2^{643192347497472} is an apocalyptic number.

It is an amenable number.

643192347497472 is an abundant number, since it is smaller than the sum of its proper divisors (1253526576569664).

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

643192347497472 is a wasteful number, since it uses less digits than its factorization.

643192347497472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1484911484 (or 1484911463 counting only the distinct ones).

The product of its digits is 1536288768, while the sum is 72.

The spelling of 643192347497472 in words is "six hundred forty-three trillion, one hundred ninety-two billion, three hundred forty-seven million, four hundred ninety-seven thousand, four hundred seventy-two".