643074073038 has 48 divisors (see below), whose sum is σ = 1454398747776. Its totient is φ = 204968705040.

The previous prime is 643074073027. The next prime is 643074073079. The reversal of 643074073038 is 830370470346.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 643074072984 and 643074073002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 968581 + ... + 1491407.

It is an arithmetic number, because the mean of its divisors is an integer number (30299973912).

Almost surely, 2^643074073038 is an apocalyptic number.

643074073038 is an abundant number, since it is smaller than the sum of its proper divisors (811324674738).

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

643074073038 is a wasteful number, since it uses less digits than its factorization.

643074073038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525829 (or 525826 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 45.

The spelling of 643074073038 in words is "six hundred forty-three billion, seventy-four million, seventy-three thousand, thirty-eight".