491788528425 has 36 divisors (see below), whose sum is σ = 881360414844. Its totient is φ = 262134604800.

The previous prime is 491788528409. The next prime is 491788528453. The reversal of 491788528425 is 524825887194.

491788528425 is a `hidden beast` number, since 4 + 9 + 1 + 7 + 88 + 528 + 4 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 21779561241 + 470008967184 = 147579^2 + 685572^2 .

It is not a de Polignac number, because 491788528425 - 2⁴ = 491788528409 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 247792 + ... + 1022241.

Almost surely, 2^491788528425 is an apocalyptic number.

491788528425 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

491788528425 is a deficient number, since it is larger than the sum of its proper divisors (389571886419).

491788528425 is a wasteful number, since it uses less digits than its factorization.

491788528425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271770 (or 1271762 counting only the distinct ones).

The product of its digits is 51609600, while the sum is 63.

The spelling of 491788528425 in words is "four hundred ninety-one billion, seven hundred eighty-eight million, five hundred twenty-eight thousand, four hundred twenty-five".