64794175209 has 15 divisors (see below), whose sum is σ = 96794721133. Its totient is φ = 43194589524.

The previous prime is 64794175177. The next prime is 64794175223. The reversal of 64794175209 is 90257149746.

The square root of 64794175209 is 254547.

It is a perfect power (a square), and thus also a powerful number.

64794175209 is a `hidden beast` number, since 6 + 4 + 79 + 41 + 7 + 520 + 9 = 666.

It is not a de Polignac number, because 64794175209 - 2⁵ = 64794175177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64794175009) by changing a digit.

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 14 ways as a sum of consecutive naturals, for example, 2276782 + ... + 2305064.

Almost surely, 2^64794175209 is an apocalyptic number.

64794175209 is the 254547-th square number.

64794175209 is the 127274-th centered octagonal number.

It is an amenable number.

64794175209 is a deficient number, since it is larger than the sum of its proper divisors (32000545924).

64794175209 is an frugal number, since it uses more digits than its factorization.

64794175209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56578 (or 28286 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 54.

The spelling of 64794175209 in words is "sixty-four billion, seven hundred ninety-four million, one hundred seventy-five thousand, two hundred nine".