846121653215999 has 4 divisors (see below), whose sum is σ = 882909551181936. Its totient is φ = 809333755250064.

The previous prime is 846121653215981. The next prime is 846121653216083. The reversal of 846121653215999 is 999512356121648.

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 846121653215999 - 2¹⁶ = 846121653150463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (846121653215099) 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, 18393948982934 + ... + 18393948982979.

It is an arithmetic number, because the mean of its divisors is an integer number (220727387795484).

Almost surely, 2^{846121653215999} is an apocalyptic number.

846121653215999 is a deficient number, since it is larger than the sum of its proper divisors (36787897965937).

846121653215999 is a wasteful number, since it uses less digits than its factorization.

846121653215999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36787897965936.

The product of its digits is 251942400, while the sum is 71.

The spelling of 846121653215999 in words is "eight hundred forty-six trillion, one hundred twenty-one billion, six hundred fifty-three million, two hundred fifteen thousand, nine hundred ninety-nine".