64754779320 has 960 divisors, whose sum is σ = 286785100800. Its totient is φ = 12729623040.

The previous prime is 64754779303. The next prime is 64754779321. The reversal of 64754779320 is 2397745746.

64754779320 is a `hidden beast` number, since 6 + 4 + 7 + 547 + 7 + 93 + 2 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64754779321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 90061921 + ... + 90062639.

It is an arithmetic number, because the mean of its divisors is an integer number (298734480).

Almost surely, 2^64754779320 is an apocalyptic number.

64754779320 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 64754779320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143392550400).

64754779320 is an abundant number, since it is smaller than the sum of its proper divisors (222030321480).

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

64754779320 is a wasteful number, since it uses less digits than its factorization.

64754779320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 766 counting only the distinct ones).

The product of its (nonzero) digits is 8890560, while the sum is 54.

The spelling of 64754779320 in words is "sixty-four billion, seven hundred fifty-four million, seven hundred seventy-nine thousand, three hundred twenty".