840008480847 has 4 divisors (see below), whose sum is σ = 1120011307800. Its totient is φ = 560005653896.

The previous prime is 840008480827. The next prime is 840008480851. The reversal of 840008480847 is 748084800048.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 840008480847 - 2¹² = 840008476751 is a prime.

It is a super-2 number, since 2×840008480847² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 840008480847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840008480827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140001413472 + ... + 140001413477.

It is an arithmetic number, because the mean of its divisors is an integer number (280002826950).

Almost surely, 2^840008480847 is an apocalyptic number.

840008480847 is a deficient number, since it is larger than the sum of its proper divisors (280002826953).

840008480847 is a wasteful number, since it uses less digits than its factorization.

840008480847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280002826952.

The product of its (nonzero) digits is 1835008, while the sum is 51.

The spelling of 840008480847 in words is "eight hundred forty billion, eight million, four hundred eighty thousand, eight hundred forty-seven".