4491508785125 has 32 divisors (see below), whose sum is σ = 5935416256224. Its totient is φ = 3381680256000.

The previous prime is 4491508785121. The next prime is 4491508785151. The reversal of 4491508785125 is 5215878051944.

It is a Cunningham number, because it is equal to 2119318²+1.

It can be written as a sum of positive squares in 16 ways, for example, as 1145689796161 + 3345818988964 = 1070369^2 + 1829158^2 .

It is not a de Polignac number, because 4491508785125 - 2² = 4491508785121 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491508785121) 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, 62823899 + ... + 62895351.

It is an arithmetic number, because the mean of its divisors is an integer number (185481758007).

Almost surely, 2^{4491508785125} is an apocalyptic number.

It is an amenable number.

4491508785125 is a deficient number, since it is larger than the sum of its proper divisors (1443907471099).

4491508785125 is a wasteful number, since it uses less digits than its factorization.

4491508785125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101066 (or 101056 counting only the distinct ones).

The product of its (nonzero) digits is 16128000, while the sum is 59.

The spelling of 4491508785125 in words is "four trillion, four hundred ninety-one billion, five hundred eight million, seven hundred eighty-five thousand, one hundred twenty-five".