685222858019 has 8 divisors (see below), whose sum is σ = 783117132288. Its totient is φ = 587329907400.

The previous prime is 685222858013. The next prime is 685222858039. The reversal of 685222858019 is 910858222586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 685222858019 - 2⁴ = 685222858003 is a prime.

It is a super-2 number, since 2×685222858019² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685222858013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1342724 + ... + 1781390.

It is an arithmetic number, because the mean of its divisors is an integer number (97889641536).

Almost surely, 2^685222858019 is an apocalyptic number.

685222858019 is a deficient number, since it is larger than the sum of its proper divisors (97894274269).

685222858019 is a wasteful number, since it uses less digits than its factorization.

685222858019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661825.

The product of its (nonzero) digits is 5529600, while the sum is 56.

The spelling of 685222858019 in words is "six hundred eighty-five billion, two hundred twenty-two million, eight hundred fifty-eight thousand, nineteen".