846728816781 has 4 divisors (see below), whose sum is σ = 1128971755712. Its totient is φ = 564485877852.

The previous prime is 846728816761. The next prime is 846728816797. The reversal of 846728816781 is 187618827648.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 846728816781 - 2²⁶ = 846661707917 is a prime.

It is a super-2 number, since 2×846728816781² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (846728816761) 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, 141121469461 + ... + 141121469466.

It is an arithmetic number, because the mean of its divisors is an integer number (282242938928).

Almost surely, 2^846728816781 is an apocalyptic number.

It is an amenable number.

846728816781 is a deficient number, since it is larger than the sum of its proper divisors (282242938931).

846728816781 is a wasteful number, since it uses less digits than its factorization.

846728816781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282242938930.

The product of its digits is 57802752, while the sum is 66.

The spelling of 846728816781 in words is "eight hundred forty-six billion, seven hundred twenty-eight million, eight hundred sixteen thousand, seven hundred eighty-one".