64278325 has 12 divisors (see below), whose sum is σ = 80799268. Its totient is φ = 50716800.

The previous prime is 64278301. The next prime is 64278329. The reversal of 64278325 is 52387246.

It can be written as a sum of positive squares in 6 ways, for example, as 1456849 + 62821476 = 1207^2 + 7926^2 .

It is not a de Polignac number, because 64278325 - 2¹⁹ = 63754037 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 (64278329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15786 + ... + 19435.

Almost surely, 2^64278325 is an apocalyptic number.

It is an amenable number.

64278325 is a deficient number, since it is larger than the sum of its proper divisors (16520943).

64278325 is a wasteful number, since it uses less digits than its factorization.

64278325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35304 (or 35299 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 64278325 is about 8017.3764412057. The cubic root of 64278325 is about 400.5790052280.

The spelling of 64278325 in words is "sixty-four million, two hundred seventy-eight thousand, three hundred twenty-five".