485878505691 has 4 divisors (see below), whose sum is σ = 647838007592. Its totient is φ = 323919003792.

The previous prime is 485878505687. The next prime is 485878505713. The reversal of 485878505691 is 196505878584.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 485878505691 - 2² = 485878505687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (485878505681) 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, 80979750946 + ... + 80979750951.

It is an arithmetic number, because the mean of its divisors is an integer number (161959501898).

Almost surely, 2^485878505691 is an apocalyptic number.

485878505691 is a deficient number, since it is larger than the sum of its proper divisors (161959501901).

485878505691 is a wasteful number, since it uses less digits than its factorization.

485878505691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161959501900.

The product of its (nonzero) digits is 96768000, while the sum is 66.

The spelling of 485878505691 in words is "four hundred eighty-five billion, eight hundred seventy-eight million, five hundred five thousand, six hundred ninety-one".