685000486637 has 4 divisors (see below), whose sum is σ = 685198409916. Its totient is φ = 684802563360.

The previous prime is 685000486631. The next prime is 685000486741. The reversal of 685000486637 is 736684000586.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 736684000586 = 2 ⋅368342000293.

It can be written as a sum of positive squares in 2 ways, for example, as 46377345316 + 638623141321 = 215354^2 + 799139^2 .

It is a cyclic number.

It is not a de Polignac number, because 685000486637 - 2¹² = 685000482541 is a prime.

It is a super-3 number, since 3×685000486637³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685000486631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98956448 + ... + 98963369.

It is an arithmetic number, because the mean of its divisors is an integer number (171299602479).

Almost surely, 2^685000486637 is an apocalyptic number.

It is an amenable number.

685000486637 is a deficient number, since it is larger than the sum of its proper divisors (197923279).

685000486637 is a wasteful number, since it uses less digits than its factorization.

685000486637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197923278.

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 685000486637 in words is "six hundred eighty-five billion, four hundred eighty-six thousand, six hundred thirty-seven".