64441370688 has 56 divisors (see below), whose sum is σ = 180530613792. Its totient is φ = 20216899584.

The previous prime is 64441370647. The next prime is 64441370689. The reversal of 64441370688 is 88607314446.

It is a super-2 number, since 2×64441370688² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 64441370688.

It is not an unprimeable number, because it can be changed into a prime (64441370689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9868270 + ... + 9874797.

Almost surely, 2^64441370688 is an apocalyptic number.

64441370688 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

64441370688 is an abundant number, since it is smaller than the sum of its proper divisors (116089243104).

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

64441370688 is a wasteful number, since it uses less digits than its factorization.

64441370688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19743099 (or 19743089 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 51.

The spelling of 64441370688 in words is "sixty-four billion, four hundred forty-one million, three hundred seventy thousand, six hundred eighty-eight".