685734133321 has 4 divisors (see below), whose sum is σ = 700324221312. Its totient is φ = 671144045332.

The previous prime is 685734133319. The next prime is 685734133339. The reversal of 685734133321 is 123331437586.

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 a cyclic number.

It is not a de Polignac number, because 685734133321 - 2¹ = 685734133319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685734133421) 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, 7295043925 + ... + 7295044018.

It is an arithmetic number, because the mean of its divisors is an integer number (175081055328).

Almost surely, 2^685734133321 is an apocalyptic number.

It is an amenable number.

685734133321 is a deficient number, since it is larger than the sum of its proper divisors (14590087991).

685734133321 is a wasteful number, since it uses less digits than its factorization.

685734133321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14590087990.

The product of its digits is 1088640, while the sum is 46.

The spelling of 685734133321 in words is "six hundred eighty-five billion, seven hundred thirty-four million, one hundred thirty-three thousand, three hundred twenty-one".