64806195888 has 360 divisors, whose sum is σ = 216096660000. Its totient is φ = 17758863360.

The previous prime is 64806195877. The next prime is 64806195899. The reversal of 64806195888 is 88859160846.

64806195888 is a `hidden beast` number, since 6 + 4 + 8 + 0 + 619 + 5 + 8 + 8 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (64806195877) and next prime (64806195899).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 144334288 + ... + 144334736.

It is an arithmetic number, because the mean of its divisors is an integer number (600268500).

Almost surely, 2^64806195888 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 64806195888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108048330000).

64806195888 is an abundant number, since it is smaller than the sum of its proper divisors (151290464112).

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

64806195888 is a wasteful number, since it uses less digits than its factorization.

64806195888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 26542080, while the sum is 63.

The spelling of 64806195888 in words is "sixty-four billion, eight hundred six million, one hundred ninety-five thousand, eight hundred eighty-eight".