685417161 has 32 divisors (see below), whose sum is σ = 1108316160. Its totient is φ = 371073600.

The previous prime is 685417157. The next prime is 685417189. The reversal of 685417161 is 161714586.

It is not a de Polignac number, because 685417161 - 2² = 685417157 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (685417361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12471 + ... + 39068.

It is an arithmetic number, because the mean of its divisors is an integer number (34634880).

Almost surely, 2^685417161 is an apocalyptic number.

It is an amenable number.

685417161 is a deficient number, since it is larger than the sum of its proper divisors (422898999).

685417161 is a wasteful number, since it uses less digits than its factorization.

685417161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51597.

The product of its digits is 40320, while the sum is 39.

The square root of 685417161 is about 26180.4728948887. The cubic root of 685417161 is about 881.6948916644.

The spelling of 685417161 in words is "six hundred eighty-five million, four hundred seventeen thousand, one hundred sixty-one".