64979964280 has 1024 divisors, whose sum is σ = 218972160000. Its totient is φ = 17069875200.

The previous prime is 64979964277. The next prime is 64979964319. The reversal of 64979964280 is 8246997946.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1511161939 + ... + 1511161981.

It is an arithmetic number, because the mean of its divisors is an integer number (213840000).

Almost surely, 2^64979964280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64979964280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109486080000).

64979964280 is an abundant number, since it is smaller than the sum of its proper divisors (153992195720).

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

64979964280 is a wasteful number, since it uses less digits than its factorization.

64979964280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 64.

The spelling of 64979964280 in words is "sixty-four billion, nine hundred seventy-nine million, nine hundred sixty-four thousand, two hundred eighty".