494581660225 has 27 divisors (see below), whose sum is σ = 628067306979. Its totient is φ = 386345660400.

The previous prime is 494581660213. The next prime is 494581660231. The reversal of 494581660225 is 522066185494.

The square root of 494581660225 is 703265.

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., 178049397681 + 316532262544 = 421959^2 + 562612^2 .

It is not a de Polignac number, because 494581660225 - 2⁹ = 494581659713 is a prime.

It is a super-2 number, since 2×494581660225² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 151200340 + ... + 151203610.

Almost surely, 2^494581660225 is an apocalyptic number.

494581660225 is the 703265-th square number.

494581660225 is the 351633-rd centered octagonal number.

It is an amenable number.

494581660225 is a deficient number, since it is larger than the sum of its proper divisors (133485646754).

494581660225 is an frugal number, since it uses more digits than its factorization.

494581660225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6638 (or 3319 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 52.

The spelling of 494581660225 in words is "four hundred ninety-four billion, five hundred eighty-one million, six hundred sixty thousand, two hundred twenty-five".