490688717485 has 12 divisors (see below), whose sum is σ = 623471517468. Its totient is φ = 369454877568.

The previous prime is 490688717471. The next prime is 490688717509. The reversal of 490688717485 is 584717886094.

It can be written as a sum of positive squares in 2 ways, for example, as 282867613609 + 207821103876 = 531853^2 + 455874^2 .

It is not a de Polignac number, because 490688717485 - 2¹¹ = 490688715437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 490688717485.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6420226 + ... + 6496204.

It is an arithmetic number, because the mean of its divisors is an integer number (51955959789).

Almost surely, 2^490688717485 is an apocalyptic number.

It is an amenable number.

490688717485 is a deficient number, since it is larger than the sum of its proper divisors (132782799983).

490688717485 is an frugal number, since it uses more digits than its factorization.

490688717485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151980 (or 76001 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 67.

The spelling of 490688717485 in words is "four hundred ninety billion, six hundred eighty-eight million, seven hundred seventeen thousand, four hundred eighty-five".