64771425 has 18 divisors (see below), whose sum is σ = 116013222. Its totient is φ = 34544640.

The previous prime is 64771417. The next prime is 64771429. The reversal of 64771425 is 52417746.

64771425 is a `hidden beast` number, since 647 + 7 + 1 + 4 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 2944656 + 61826769 = 1716^2 + 7863^2 .

It is not a de Polignac number, because 64771425 - 2³ = 64771417 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 64771425.

It is not an unprimeable number, because it can be changed into a prime (64771429) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 143712 + ... + 144161.

It is an arithmetic number, because the mean of its divisors is an integer number (6445179).

Almost surely, 2^64771425 is an apocalyptic number.

It is an amenable number.

64771425 is a deficient number, since it is larger than the sum of its proper divisors (51241797).

64771425 is a wasteful number, since it uses less digits than its factorization.

64771425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287889 (or 287881 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 64771425 is about 8048.0696443309. The cubic root of 64771425 is about 401.6007211017.

The spelling of 64771425 in words is "sixty-four million, seven hundred seventy-one thousand, four hundred twenty-five".