685425188354 has 4 divisors (see below), whose sum is σ = 1028137782534. Its totient is φ = 342712594176.

The previous prime is 685425188333. The next prime is 685425188389. The reversal of 685425188354 is 453881524586.

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

It can be written as a sum of positive squares in only one way, i.e., 473857387129 + 211567801225 = 688373^2 + 459965^2 .

It is a junction number, because it is equal to n+sod(n) for n = 685425188293 and 685425188302.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171356297087 + ... + 171356297090.

Almost surely, 2^685425188354 is an apocalyptic number.

685425188354 is a deficient number, since it is larger than the sum of its proper divisors (342712594180).

685425188354 is a wasteful number, since it uses less digits than its factorization.

685425188354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342712594179.

The product of its digits is 36864000, while the sum is 59.

The spelling of 685425188354 in words is "six hundred eighty-five billion, four hundred twenty-five million, one hundred eighty-eight thousand, three hundred fifty-four".