64449966711200 has 144 divisors (see below), whose sum is σ = 180667616157504. Its totient is φ = 21992405299200.

The previous prime is 64449966711197. The next prime is 64449966711203. The reversal of 64449966711200 is 211766994446.

It is an interprime number because it is at equal distance from previous prime (64449966711197) and next prime (64449966711203).

It is a self number, because there is not a number n which added to its sum of digits gives 64449966711200.

It is not an unprimeable number, because it can be changed into a prime (64449966711203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26090729 + ... + 28453928.

It is an arithmetic number, because the mean of its divisors is an integer number (1254636223316).

Almost surely, 2^{64449966711200} is an apocalyptic number.

It is an amenable number.

64449966711200 is an abundant number, since it is smaller than the sum of its proper divisors (116217649446304).

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

64449966711200 is a wasteful number, since it uses less digits than its factorization.

64449966711200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54544895 (or 54544882 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 59.

The spelling of 64449966711200 in words is "sixty-four trillion, four hundred forty-nine billion, nine hundred sixty-six million, seven hundred eleven thousand, two hundred".