395665649109 has 12 divisors (see below), whose sum is σ = 571522775616. Its totient is φ = 263774456232.

The previous prime is 395665649081. The next prime is 395665649129. The reversal of 395665649109 is 901946566593.

395665649109 is a `hidden beast` number, since 3 + 9 + 5 + 66 + 564 + 9 + 1 + 0 + 9 = 666.

It is not a de Polignac number, because 395665649109 - 2¹³ = 395665640917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395665649129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1231174 + ... + 1518920.

It is an arithmetic number, because the mean of its divisors is an integer number (47626897968).

Almost surely, 2^395665649109 is an apocalyptic number.

It is an amenable number.

395665649109 is a deficient number, since it is larger than the sum of its proper divisors (175857126507).

395665649109 is a wasteful number, since it uses less digits than its factorization.

395665649109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440536 (or 440533 counting only the distinct ones).

The product of its (nonzero) digits is 47239200, while the sum is 63.

The spelling of 395665649109 in words is "three hundred ninety-five billion, six hundred sixty-five million, six hundred forty-nine thousand, one hundred nine".