64420335650 has 48 divisors (see below), whose sum is σ = 130983670080. Its totient is φ = 23377377600.

The previous prime is 64420335569. The next prime is 64420335701. The reversal of 64420335650 is 5653302446.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 147596 + ... + 388104.

It is an arithmetic number, because the mean of its divisors is an integer number (2728826460).

Almost surely, 2^64420335650 is an apocalyptic number.

64420335650 is an abundant number, since it is smaller than the sum of its proper divisors (66563334430).

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

64420335650 is a wasteful number, since it uses less digits than its factorization.

64420335650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241019 (or 241014 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 38.

The spelling of 64420335650 in words is "sixty-four billion, four hundred twenty million, three hundred thirty-five thousand, six hundred fifty".