491518085 has 16 divisors (see below), whose sum is σ = 603348480. Its totient is φ = 384275520.

The previous prime is 491518061. The next prime is 491518103. The reversal of 491518085 is 580815194.

It is not a de Polignac number, because 491518085 - 2²⁶ = 424409221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46220 + ... + 55850.

It is an arithmetic number, because the mean of its divisors is an integer number (37709280).

Almost surely, 2^491518085 is an apocalyptic number.

It is an amenable number.

491518085 is a deficient number, since it is larger than the sum of its proper divisors (111830395).

491518085 is a wasteful number, since it uses less digits than its factorization.

491518085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9868.

The product of its (nonzero) digits is 57600, while the sum is 41.

The square root of 491518085 is about 22170.2071483331. The cubic root of 491518085 is about 789.1868388721.

The spelling of 491518085 in words is "four hundred ninety-one million, five hundred eighteen thousand, eighty-five".