64443922266 has 16 divisors (see below), whose sum is σ = 128890389600. Its totient is φ = 21480883248.

The previous prime is 64443922253. The next prime is 64443922313. The reversal of 64443922266 is 66222934446.

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, 437220 + ... + 565728.

It is an arithmetic number, because the mean of its divisors is an integer number (8055649350).

Almost surely, 2^64443922266 is an apocalyptic number.

64443922266 is an abundant number, since it is smaller than the sum of its proper divisors (64446467334).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64443922266 is a wasteful number, since it uses less digits than its factorization.

64443922266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212093.

The product of its digits is 2985984, while the sum is 48.

The spelling of 64443922266 in words is "sixty-four billion, four hundred forty-three million, nine hundred twenty-two thousand, two hundred sixty-six".