64385573980 has 192 divisors, whose sum is σ = 176880936960. Its totient is φ = 19116020736.

The previous prime is 64385573933. The next prime is 64385574007. The reversal of 64385573980 is 8937558346.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3552702 + ... + 3570778.

It is an arithmetic number, because the mean of its divisors is an integer number (921254880).

Almost surely, 2^64385573980 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 64385573980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88440468480).

64385573980 is an abundant number, since it is smaller than the sum of its proper divisors (112495362980).

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

64385573980 is a wasteful number, since it uses less digits than its factorization.

64385573980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18228 (or 18226 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 64385573980 in words is "sixty-four billion, three hundred eighty-five million, five hundred seventy-three thousand, nine hundred eighty".