4491508785124 has 27 divisors (see below), whose sum is σ = 7921578771561. Its totient is φ = 2228335717920.

The previous prime is 4491508785121. The next prime is 4491508785151. The reversal of 4491508785124 is 4215878051944.

It is a happy number.

The square root of 4491508785124 is 2119318.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 54250794724 + 4437257990400 = 232918^2 + 2106480^2 .

It is a Duffinian 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 8 ways as a sum of consecutive naturals, for example, 555257272 + ... + 555265360.

Almost surely, 2^{4491508785124} is an apocalyptic number.

4491508785124 is the 2119318-th square number.

It is an amenable number.

4491508785124 is a deficient number, since it is larger than the sum of its proper divisors (3430069986437).

4491508785124 is an frugal number, since it uses more digits than its factorization.

4491508785124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16444 (or 8222 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 58.

The spelling of 4491508785124 in words is "four trillion, four hundred ninety-one billion, five hundred eight million, seven hundred eighty-five thousand, one hundred twenty-four".