64116555309 has 24 divisors (see below), whose sum is σ = 98081031672. Its totient is φ = 40221619200.

The previous prime is 64116555263. The next prime is 64116555313. The reversal of 64116555309 is 90355561146.

64116555309 is a `hidden beast` number, since 64 + 1 + 1 + 6 + 55 + 530 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4796100 + 64111759209 = 2190^2 + 253203^2 .

It is not a de Polignac number, because 64116555309 - 2⁹ = 64116554797 is a prime.

It is a super-2 number, since 2×64116555309² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64116555509) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 739377 + ... + 821529.

It is an arithmetic number, because the mean of its divisors is an integer number (4086709653).

Almost surely, 2^64116555309 is an apocalyptic number.

It is an amenable number.

64116555309 is a deficient number, since it is larger than the sum of its proper divisors (33964476363).

64116555309 is a wasteful number, since it uses less digits than its factorization.

64116555309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87277 (or 87274 counting only the distinct ones).

The product of its (nonzero) digits is 486000, while the sum is 45.

The spelling of 64116555309 in words is "sixty-four billion, one hundred sixteen million, five hundred fifty-five thousand, three hundred nine".