64063742820 has 576 divisors, whose sum is σ = 246913712640. Its totient is φ = 12092129280.

The previous prime is 64063742789. The next prime is 64063742843. The reversal of 64063742820 is 2824736046.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 25052982 + ... + 25055538.

It is an arithmetic number, because the mean of its divisors is an integer number (428669640).

Almost surely, 2^64063742820 is an apocalyptic number.

64063742820 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 64063742820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123456856320).

64063742820 is an abundant number, since it is smaller than the sum of its proper divisors (182849969820).

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

64063742820 is a wasteful number, since it uses less digits than its factorization.

64063742820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2644 (or 2631 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 42.

The spelling of 64063742820 in words is "sixty-four billion, sixty-three million, seven hundred forty-two thousand, eight hundred twenty".