491602885857 has 32 divisors (see below), whose sum is σ = 732292565760. Its totient is φ = 325943481600.

The previous prime is 491602885853. The next prime is 491602885861. The reversal of 491602885857 is 758588206194.

491602885857 is a `hidden beast` number, since 49 + 1 + 6 + 0 + 2 + 8 + 8 + 585 + 7 = 666.

It is an interprime number because it is at equal distance from previous prime (491602885853) and next prime (491602885861).

It is not a de Polignac number, because 491602885857 - 2² = 491602885853 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 491602885794 and 491602885803.

It is not an unprimeable number, because it can be changed into a prime (491602885853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3788857 + ... + 3916457.

It is an arithmetic number, because the mean of its divisors is an integer number (22884142680).

Almost surely, 2^491602885857 is an apocalyptic number.

It is an amenable number.

491602885857 is a deficient number, since it is larger than the sum of its proper divisors (240689679903).

491602885857 is a wasteful number, since it uses less digits than its factorization.

491602885857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128390 (or 128384 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 63.

The spelling of 491602885857 in words is "four hundred ninety-one billion, six hundred two million, eight hundred eighty-five thousand, eight hundred fifty-seven".