64699614720 has 480 divisors, whose sum is σ = 254032178400. Its totient is φ = 15086518272.

The previous prime is 64699614677. The next prime is 64699614737. The reversal of 64699614720 is 2741699646.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5685196 + ... + 5696564.

It is an arithmetic number, because the mean of its divisors is an integer number (529233705).

Almost surely, 2^64699614720 is an apocalyptic number.

64699614720 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 64699614720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127016089200).

64699614720 is an abundant number, since it is smaller than the sum of its proper divisors (189332563680).

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

64699614720 is a wasteful number, since it uses less digits than its factorization.

64699614720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11430 (or 11411 counting only the distinct ones).

The product of its (nonzero) digits is 3919104, while the sum is 54.

The spelling of 64699614720 in words is "sixty-four billion, six hundred ninety-nine million, six hundred fourteen thousand, seven hundred twenty".