425205664 has 24 divisors (see below), whose sum is σ = 901518660. Its totient is φ = 196248576.

The previous prime is 425205653. The next prime is 425205673. The reversal of 425205664 is 466502524.

It can be written as a sum of positive squares in 2 ways, for example, as 423536400 + 1669264 = 20580^2 + 1292^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 510649 + ... + 511480.

Almost surely, 2^425205664 is an apocalyptic number.

It is an amenable number.

425205664 is an abundant number, since it is smaller than the sum of its proper divisors (476312996).

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

425205664 is a wasteful number, since it uses less digits than its factorization.

425205664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022152 (or 1022144 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 425205664 is about 20620.5156094604. The cubic root of 425205664 is about 751.9685553473.

It can be divided in two parts, 42520 and 5664, that added together give a palindrome (48184).

The spelling of 425205664 in words is "four hundred twenty-five million, two hundred five thousand, six hundred sixty-four".