491570577 has 12 divisors (see below), whose sum is σ = 710667984. Its totient is φ = 327426840.

The previous prime is 491570551. The next prime is 491570579. The reversal of 491570577 is 775075194.

491570577 is a `hidden beast` number, since 4 + 9 + 1 + 5 + 70 + 577 = 666.

It is not a de Polignac number, because 491570577 - 2¹⁶ = 491505041 is a prime.

It is a super-2 number, since 2×491570577² = 483283264344225858, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (491570579) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12783 + ... + 33860.

It is an arithmetic number, because the mean of its divisors is an integer number (59222332).

Almost surely, 2^491570577 is an apocalyptic number.

It is an amenable number.

491570577 is a deficient number, since it is larger than the sum of its proper divisors (219097407).

491570577 is a wasteful number, since it uses less digits than its factorization.

491570577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47820 (or 47817 counting only the distinct ones).

The product of its (nonzero) digits is 308700, while the sum is 45.

The square root of 491570577 is about 22171.3909577185. The cubic root of 491570577 is about 789.2149317827.

The spelling of 491570577 in words is "four hundred ninety-one million, five hundred seventy thousand, five hundred seventy-seven".