64642024620 has 96 divisors (see below), whose sum is σ = 201285181440. Its totient is φ = 17222731200.

The previous prime is 64642024619. The next prime is 64642024673. The reversal of 64642024620 is 2642024646.

64642024620 is a `hidden beast` number, since 6 + 4 + 6 + 4 + 2 + 0 + 24 + 620 = 666.

64642024620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64642024620² (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 an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 569539 + ... + 673541.

It is an arithmetic number, because the mean of its divisors is an integer number (2096720640).

Almost surely, 2^64642024620 is an apocalyptic number.

64642024620 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 64642024620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100642590720).

64642024620 is an abundant number, since it is smaller than the sum of its proper divisors (136643156820).

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

64642024620 is a wasteful number, since it uses less digits than its factorization.

64642024620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105172 (or 105164 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 64642024620 in words is "sixty-four billion, six hundred forty-two million, twenty-four thousand, six hundred twenty".