64144052752 has 120 divisors (see below), whose sum is σ = 143711159040. Its totient is φ = 27660971520.

The previous prime is 64144052729. The next prime is 64144052821. The reversal of 64144052752 is 25725044146.

It is a happy number.

It is a super-2 number, since 2×64144052752² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2417703 + ... + 2444089.

It is an arithmetic number, because the mean of its divisors is an integer number (1197592992).

Almost surely, 2^64144052752 is an apocalyptic number.

64144052752 is a gapful number since it is divisible by the number (62) 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 64144052752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71855579520).

64144052752 is an abundant number, since it is smaller than the sum of its proper divisors (79567106288).

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

64144052752 is a wasteful number, since it uses less digits than its factorization.

64144052752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26481 (or 26462 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 40.

Adding to 64144052752 its reverse (25725044146), we get a palindrome (89869096898).

The spelling of 64144052752 in words is "sixty-four billion, one hundred forty-four million, fifty-two thousand, seven hundred fifty-two".