64718045280 has 1152 divisors, whose sum is σ = 285389153280. Its totient is φ = 13370572800.

The previous prime is 64718045279. The next prime is 64718045291. The reversal of 64718045280 is 8254081746.

64718045280 is a `hidden beast` number, since 6 + 47 + 1 + 80 + 4 + 528 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 494030815 + ... + 494030945.

It is an arithmetic number, because the mean of its divisors is an integer number (247733640).

Almost surely, 2^64718045280 is an apocalyptic number.

64718045280 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 64718045280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142694576640).

64718045280 is an abundant number, since it is smaller than the sum of its proper divisors (220671108000).

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

64718045280 is a wasteful number, since it uses less digits than its factorization.

64718045280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 196 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 64718045280 in words is "sixty-four billion, seven hundred eighteen million, forty-five thousand, two hundred eighty".