64320791722 has 16 divisors (see below), whose sum is σ = 106294309344. Its totient is φ = 28947250000.

The previous prime is 64320791687. The next prime is 64320791747. The reversal of 64320791722 is 22719702346.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14471404 + ... + 14475847.

It is an arithmetic number, because the mean of its divisors is an integer number (6643394334).

Almost surely, 2^64320791722 is an apocalyptic number.

64320791722 is a deficient number, since it is larger than the sum of its proper divisors (41973517622).

64320791722 is a wasteful number, since it uses less digits than its factorization.

64320791722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28947365.

The product of its (nonzero) digits is 254016, while the sum is 43.

The spelling of 64320791722 in words is "sixty-four billion, three hundred twenty million, seven hundred ninety-one thousand, seven hundred twenty-two".