813832647640 has 32 divisors (see below), whose sum is σ = 1831349612880. Its totient is φ = 325492853632.

The previous prime is 813832647637. The next prime is 813832647659. The reversal of 813832647640 is 46746238318.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927439 + ... + 1577278.

Almost surely, 2^813832647640 is an apocalyptic number.

It is an amenable number.

813832647640 is an abundant number, since it is smaller than the sum of its proper divisors (1017516965240).

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

813832647640 is a wasteful number, since it uses less digits than its factorization.

813832647640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512851 (or 2512847 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 52.

The spelling of 813832647640 in words is "eight hundred thirteen billion, eight hundred thirty-two million, six hundred forty-seven thousand, six hundred forty".