64425550 has 24 divisors (see below), whose sum is σ = 136951056. Its totient is φ = 22088640.

The previous prime is 64425541. The next prime is 64425589. The reversal of 64425550 is 5552446.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91687 + ... + 92386.

It is an arithmetic number, because the mean of its divisors is an integer number (5706294).

Almost surely, 2^64425550 is an apocalyptic number.

64425550 is an abundant number, since it is smaller than the sum of its proper divisors (72525506).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64425550 is a wasteful number, since it uses less digits than its factorization.

64425550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184092 (or 184087 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 64425550 is about 8026.5528092700. The cubic root of 64425550 is about 400.8846047440.

Adding to 64425550 its reverse (5552446), we get a palindrome (69977996).

The spelling of 64425550 in words is "sixty-four million, four hundred twenty-five thousand, five hundred fifty".