64494225 has 30 divisors (see below), whose sum is σ = 119469350. Its totient is φ = 34395840.

The previous prime is 64494223. The next prime is 64494239. The reversal of 64494225 is 52249446.

64494225 is a `hidden beast` number, since 644 + 9 + 4 + 2 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 4028049 + 60466176 = 2007^2 + 7776^2 .

It is not a de Polignac number, because 64494225 - 2¹ = 64494223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64494225.

It is not an unprimeable number, because it can be changed into a prime (64494223) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 13900 + ... + 17949.

Almost surely, 2^64494225 is an apocalyptic number.

It is an amenable number.

64494225 is a deficient number, since it is larger than the sum of its proper divisors (54975125).

64494225 is a wasteful number, since it uses less digits than its factorization.

64494225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31871 (or 31857 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 64494225 is about 8030.8296582607. The cubic root of 64494225 is about 401.0269963562.

The spelling of 64494225 in words is "sixty-four million, four hundred ninety-four thousand, two hundred twenty-five".