64544082785 has 32 divisors (see below), whose sum is σ = 95825866752. Its totient is φ = 40640325120.

The previous prime is 64544082781. The next prime is 64544082793. The reversal of 64544082785 is 58728044546.

It is not a de Polignac number, because 64544082785 - 2² = 64544082781 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64544082781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284444 + ... + 458253.

It is an arithmetic number, because the mean of its divisors is an integer number (2994558336).

Almost surely, 2^64544082785 is an apocalyptic number.

64544082785 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

64544082785 is a deficient number, since it is larger than the sum of its proper divisors (31281783967).

64544082785 is a wasteful number, since it uses less digits than its factorization.

64544082785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742913.

The product of its (nonzero) digits is 8601600, while the sum is 53.

The spelling of 64544082785 in words is "sixty-four billion, five hundred forty-four million, eighty-two thousand, seven hundred eighty-five".