685540177 has 8 divisors (see below), whose sum is σ = 788167296. Its totient is φ = 584086272.

The previous prime is 685540157. The next prime is 685540183. The reversal of 685540177 is 771045586.

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

It is not a de Polignac number, because 685540177 - 2¹⁵ = 685507409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685540157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292048 + ... + 294385.

It is an arithmetic number, because the mean of its divisors is an integer number (98520912).

Almost surely, 2^685540177 is an apocalyptic number.

It is an amenable number.

685540177 is a deficient number, since it is larger than the sum of its proper divisors (102627119).

685540177 is a wasteful number, since it uses less digits than its factorization.

685540177 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586607.

The product of its (nonzero) digits is 235200, while the sum is 43.

The square root of 685540177 is about 26182.8221740896. The cubic root of 685540177 is about 881.7476362297.

The spelling of 685540177 in words is "six hundred eighty-five million, five hundred forty thousand, one hundred seventy-seven".