65644025430 has 64 divisors (see below), whose sum is σ = 159189811200. Its totient is φ = 17323092864.

The previous prime is 65644025399. The next prime is 65644025453. The reversal of 65644025430 is 3452044656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1490871 + ... + 1534269.

It is an arithmetic number, because the mean of its divisors is an integer number (2487340800).

Almost surely, 2^65644025430 is an apocalyptic number.

65644025430 is an abundant number, since it is smaller than the sum of its proper divisors (93545785770).

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

65644025430 is a wasteful number, since it uses less digits than its factorization.

65644025430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43933.

The product of its (nonzero) digits is 345600, while the sum is 39.

The spelling of 65644025430 in words is "sixty-five billion, six hundred forty-four million, twenty-five thousand, four hundred thirty".