64449522638 has 8 divisors (see below), whose sum is σ = 96695699832. Its totient is φ = 32217622696.

The previous prime is 64449522619. The next prime is 64449522653. The reversal of 64449522638 is 83622594446.

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

It is a self number, because there is not a number n which added to its sum of digits gives 64449522638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3558020 + ... + 3576087.

It is an arithmetic number, because the mean of its divisors is an integer number (12086962479).

Almost surely, 2^64449522638 is an apocalyptic number.

64449522638 is a deficient number, since it is larger than the sum of its proper divisors (32246177194).

64449522638 is a wasteful number, since it uses less digits than its factorization.

64449522638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7138626.

The product of its digits is 9953280, while the sum is 53.

The spelling of 64449522638 in words is "sixty-four billion, four hundred forty-nine million, five hundred twenty-two thousand, six hundred thirty-eight".