64240529220 has 384 divisors, whose sum is σ = 242331264000. Its totient is φ = 13792149504.

The previous prime is 64240529153. The next prime is 64240529233. The reversal of 64240529220 is 2292504246.

It is a happy number.

64240529220 is a `hidden beast` number, since 6 + 4 + 2 + 405 + 29 + 220 = 666.

64240529220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 61239256 + ... + 61240304.

It is an arithmetic number, because the mean of its divisors is an integer number (631071000).

Almost surely, 2^64240529220 is an apocalyptic number.

64240529220 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 64240529220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121165632000).

64240529220 is an abundant number, since it is smaller than the sum of its proper divisors (178090734780).

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

64240529220 is a wasteful number, since it uses less digits than its factorization.

64240529220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044 (or 2036 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The spelling of 64240529220 in words is "sixty-four billion, two hundred forty million, five hundred twenty-nine thousand, two hundred twenty".