491602828897 has 32 divisors (see below), whose sum is σ = 525828925440. Its totient is φ = 458633387520.

The previous prime is 491602828819. The next prime is 491602828921. The reversal of 491602828897 is 798828206194.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-491602828897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491602828097) 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, 48481254 + ... + 48491392.

It is an arithmetic number, because the mean of its divisors is an integer number (16432153920).

Almost surely, 2^491602828897 is an apocalyptic number.

It is an amenable number.

491602828897 is a deficient number, since it is larger than the sum of its proper divisors (34226096543).

491602828897 is a wasteful number, since it uses less digits than its factorization.

491602828897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10573.

The product of its (nonzero) digits is 27869184, while the sum is 64.

The spelling of 491602828897 in words is "four hundred ninety-one billion, six hundred two million, eight hundred twenty-eight thousand, eight hundred ninety-seven".