64696320000 has 960 divisors, whose sum is σ = 260827727160. Its totient is φ = 15925248000.

The previous prime is 64696319969. The next prime is 64696320043. The reversal of 64696320000 is 2369646.

64696320000 is a `hidden beast` number, since 646 + 9 + 6 + 3 + 2 + 0 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (960).

It is a super-2 number, since 2×64696320000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4976639994 + ... + 4976640006.

Almost surely, 2^64696320000 is an apocalyptic number.

64696320000 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 64696320000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130413863580).

64696320000 is an abundant number, since it is smaller than the sum of its proper divisors (196131407160).

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

64696320000 is an frugal number, since it uses more digits than its factorization.

64696320000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

Adding to 64696320000 its reverse (2369646), we get a palindrome (64698689646).

The spelling of 64696320000 in words is "sixty-four billion, six hundred ninety-six million, three hundred twenty thousand".