685492594545 has 32 divisors (see below), whose sum is σ = 1196538355584. Its totient is φ = 332348326400.

The previous prime is 685492594541. The next prime is 685492594603. The reversal of 685492594545 is 545495294586.

It is not a de Polignac number, because 685492594545 - 2² = 685492594541 is a prime.

It is not an unprimeable number, because it can be changed into a prime (685492594541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6290725 + ... + 6398765.

It is an arithmetic number, because the mean of its divisors is an integer number (37391823612).

Almost surely, 2^685492594545 is an apocalyptic number.

It is an amenable number.

685492594545 is a deficient number, since it is larger than the sum of its proper divisors (511045761039).

685492594545 is a wasteful number, since it uses less digits than its factorization.

685492594545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146513.

The product of its digits is 311040000, while the sum is 66.

The spelling of 685492594545 in words is "six hundred eighty-five billion, four hundred ninety-two million, five hundred ninety-four thousand, five hundred forty-five".