685537537573 has 8 divisors (see below), whose sum is σ = 783490732992. Its totient is φ = 587589157536.

The previous prime is 685537537561. The next prime is 685537537577. The reversal of 685537537573 is 375735735586.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-685537537573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685537537577) 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, 893440 + ... + 1472857.

It is an arithmetic number, because the mean of its divisors is an integer number (97936341624).

Almost surely, 2^685537537573 is an apocalyptic number.

It is an amenable number.

685537537573 is a deficient number, since it is larger than the sum of its proper divisors (97953195419).

685537537573 is a wasteful number, since it uses less digits than its factorization.

685537537573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407691.

The product of its digits is 277830000, while the sum is 64.

The spelling of 685537537573 in words is "six hundred eighty-five billion, five hundred thirty-seven million, five hundred thirty-seven thousand, five hundred seventy-three".