64222647394 has 8 divisors (see below), whose sum is σ = 98683580268. Its totient is φ = 31328120640.

The previous prime is 64222647367. The next prime is 64222647449. The reversal of 64222647394 is 49374622246.

It can be written as a sum of positive squares in 2 ways, for example, as 59387253025 + 4835394369 = 243695^2 + 69537^2 .

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 (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391601427 + ... + 391601590.

Almost surely, 2^64222647394 is an apocalyptic number.

64222647394 is a deficient number, since it is larger than the sum of its proper divisors (34460932874).

64222647394 is a wasteful number, since it uses less digits than its factorization.

64222647394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 783203060.

The product of its digits is 3483648, while the sum is 49.

The spelling of 64222647394 in words is "sixty-four billion, two hundred twenty-two million, six hundred forty-seven thousand, three hundred ninety-four".