64434305785 has 8 divisors (see below), whose sum is σ = 77370394176. Its totient is φ = 51514626480.

The previous prime is 64434305737. The next prime is 64434305797. The reversal of 64434305785 is 58750343446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 64434305785 - 2²³ = 64425917177 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4093629 + ... + 4109338.

It is an arithmetic number, because the mean of its divisors is an integer number (9671299272).

Almost surely, 2^64434305785 is an apocalyptic number.

It is an amenable number.

64434305785 is a deficient number, since it is larger than the sum of its proper divisors (12936088391).

64434305785 is a wasteful number, since it uses less digits than its factorization.

64434305785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8204543.

The product of its (nonzero) digits is 4838400, while the sum is 49.

The spelling of 64434305785 in words is "sixty-four billion, four hundred thirty-four million, three hundred five thousand, seven hundred eighty-five".