491860443685 has 32 divisors (see below), whose sum is σ = 654914437632. Its totient is φ = 352266382080.

The previous prime is 491860443673. The next prime is 491860443691. The reversal of 491860443685 is 586344068194.

It is not a de Polignac number, because 491860443685 - 2¹⁵ = 491860410917 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 419152 + ... + 1076758.

It is an arithmetic number, because the mean of its divisors is an integer number (20466076176).

Almost surely, 2^491860443685 is an apocalyptic number.

It is an amenable number.

491860443685 is a deficient number, since it is larger than the sum of its proper divisors (163053993947).

491860443685 is a wasteful number, since it uses less digits than its factorization.

491860443685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657973.

The product of its (nonzero) digits is 19906560, while the sum is 58.

The spelling of 491860443685 in words is "four hundred ninety-one billion, eight hundred sixty million, four hundred forty-three thousand, six hundred eighty-five".