64394507522 has 8 divisors (see below), whose sum is σ = 96637480716. Its totient is φ = 32182013952.

The previous prime is 64394507503. The next prime is 64394507537. The reversal of 64394507522 is 22570549346.

It can be written as a sum of positive squares in 2 ways, for example, as 62680630321 + 1713877201 = 250361^2 + 41399^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7614623 + ... + 7623074.

Almost surely, 2^64394507522 is an apocalyptic number.

64394507522 is a deficient number, since it is larger than the sum of its proper divisors (32242973194).

64394507522 is a wasteful number, since it uses less digits than its factorization.

64394507522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15239812.

The product of its (nonzero) digits is 1814400, while the sum is 47.

The spelling of 64394507522 in words is "sixty-four billion, three hundred ninety-four million, five hundred seven thousand, five hundred twenty-two".