64748866320 has 240 divisors, whose sum is σ = 231599135040. Its totient is φ = 16799519232.

The previous prime is 64748866307. The next prime is 64748866339. The reversal of 64748866320 is 2366884746.

64748866320 is a `hidden beast` number, since 6 + 474 + 88 + 66 + 32 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 674271 + ... + 764289.

It is an arithmetic number, because the mean of its divisors is an integer number (964996396).

Almost surely, 2^64748866320 is an apocalyptic number.

64748866320 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 64748866320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115799567520).

64748866320 is an abundant number, since it is smaller than the sum of its proper divisors (166850268720).

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

64748866320 is a wasteful number, since it uses less digits than its factorization.

64748866320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90084 (or 90066 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 54.

The spelling of 64748866320 in words is "sixty-four billion, seven hundred forty-eight million, eight hundred sixty-six thousand, three hundred twenty".