64713057220 has 96 divisors (see below), whose sum is σ = 163552032000. Its totient is φ = 21011042304.

The previous prime is 64713057151. The next prime is 64713057289. The reversal of 64713057220 is 2275031746.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (64713057151) and next prime (64713057289).

It is a self number, because there is not a number n which added to its sum of digits gives 64713057220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12363724 + ... + 12368956.

It is an arithmetic number, because the mean of its divisors is an integer number (1703667000).

Almost surely, 2^64713057220 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 64713057220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81776016000).

64713057220 is an abundant number, since it is smaller than the sum of its proper divisors (98838974780).

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

64713057220 is a wasteful number, since it uses less digits than its factorization.

64713057220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9917 (or 9915 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

Adding to 64713057220 its reverse (2275031746), we get a palindrome (66988088966).

The spelling of 64713057220 in words is "sixty-four billion, seven hundred thirteen million, fifty-seven thousand, two hundred twenty".