64644303292 has 12 divisors (see below), whose sum is σ = 119782091520. Its totient is φ = 30420848576.

The previous prime is 64644303271. The next prime is 64644303293. The reversal of 64644303292 is 29230344646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64644303293) by changing a digit.

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, 475325692 + ... + 475325827.

It is an arithmetic number, because the mean of its divisors is an integer number (9981840960).

Almost surely, 2^64644303292 is an apocalyptic number.

It is an amenable number.

64644303292 is a deficient number, since it is larger than the sum of its proper divisors (55137788228).

64644303292 is a wasteful number, since it uses less digits than its factorization.

64644303292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950651540 (or 950651538 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 64644303292 in words is "sixty-four billion, six hundred forty-four million, three hundred three thousand, two hundred ninety-two".