494651989225 has 9 divisors (see below), whose sum is σ = 613372827223. Its totient is φ = 395718778120.

The previous prime is 494651989217. The next prime is 494651989289. The reversal of 494651989225 is 522989156494.

The square root of 494651989225 is 703315.

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., 178074716121 + 316577273104 = 421989^2 + 562652^2 .

It is not a de Polignac number, because 494651989225 - 2³ = 494651989217 is a prime.

It is a super-2 number, since 2×494651989225² (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 8 ways as a sum of consecutive naturals, for example, 3446244 + ... + 3586906.

Almost surely, 2^494651989225 is an apocalyptic number.

494651989225 is the 703315-th square number.

494651989225 is the 351658-th centered octagonal number.

It is an amenable number.

494651989225 is a deficient number, since it is larger than the sum of its proper divisors (118720837998).

494651989225 is an frugal number, since it uses more digits than its factorization.

494651989225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281336 (or 140668 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 64.

Multiplying 494651989225 by its sum of digits (64), we get a square (31657727310400 = 5626520²).

The spelling of 494651989225 in words is "four hundred ninety-four billion, six hundred fifty-one million, nine hundred eighty-nine thousand, two hundred twenty-five".