64941914880 has 864 divisors, whose sum is σ = 258968586240. Its totient is φ = 14916648960.

The previous prime is 64941914813. The next prime is 64941914887. The reversal of 64941914880 is 8841914946.

It is a happy number.

64941914880 is a `hidden beast` number, since 6 + 4 + 9 + 419 + 148 + 80 = 666.

It is not an unprimeable number, because it can be changed into a prime (64941914887) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 115349479 + ... + 115350041.

It is an arithmetic number, because the mean of its divisors is an integer number (299732160).

Almost surely, 2^64941914880 is an apocalyptic number.

64941914880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64941914880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129484293120).

64941914880 is an abundant number, since it is smaller than the sum of its proper divisors (194026671360).

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

64941914880 is a wasteful number, since it uses less digits than its factorization.

64941914880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The spelling of 64941914880 in words is "sixty-four billion, nine hundred forty-one million, nine hundred fourteen thousand, eight hundred eighty".