64181425 has 54 divisors (see below), whose sum is σ = 101994774. Its totient is φ = 39916800.

The previous prime is 64181419. The next prime is 64181471. The reversal of 64181425 is 52418146.

It can be written as a sum of positive squares in 3 ways, for example, as 53361 + 64128064 = 231^2 + 8008^2 .

It is not a de Polignac number, because 64181425 - 2⁵ = 64181393 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 148009 + ... + 148441.

Almost surely, 2^64181425 is an apocalyptic number.

It is an amenable number.

64181425 is a deficient number, since it is larger than the sum of its proper divisors (37813349).

64181425 is a wasteful number, since it uses less digits than its factorization.

64181425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479 (or 456 counting only the distinct ones).

The product of its digits is 7680, while the sum is 31.

The square root of 64181425 is about 8011.3310379737. The cubic root of 64181425 is about 400.3776121605.

The spelling of 64181425 in words is "sixty-four million, one hundred eighty-one thousand, four hundred twenty-five".