685277338055 has 4 divisors (see below), whose sum is σ = 822332805672. Its totient is φ = 548221870440.

The previous prime is 685277338037. The next prime is 685277338117. The reversal of 685277338055 is 550833772586.

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

It is not a de Polignac number, because 685277338055 - 2¹⁴ = 685277321671 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 685277337985 and 685277338003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68527733801 + ... + 68527733810.

It is an arithmetic number, because the mean of its divisors is an integer number (205583201418).

Almost surely, 2^685277338055 is an apocalyptic number.

685277338055 is a deficient number, since it is larger than the sum of its proper divisors (137055467617).

685277338055 is a wasteful number, since it uses less digits than its factorization.

685277338055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137055467616.

The product of its (nonzero) digits is 42336000, while the sum is 59.

The spelling of 685277338055 in words is "six hundred eighty-five billion, two hundred seventy-seven million, three hundred thirty-eight thousand, fifty-five".