64204226685 has 12 divisors (see below), whose sum is σ = 111287326332. Its totient is φ = 34242254208.

The previous prime is 64204226657. The next prime is 64204226687. The reversal of 64204226685 is 58662240246.

It can be written as a sum of positive squares in 2 ways, for example, as 43126413561 + 21077813124 = 207669^2 + 145182^2 .

It is not a de Polignac number, because 64204226685 - 2⁹ = 64204226173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1426760593 = 64204226685 / (6 + 4 + 2 + 0 + 4 + 2 + 2 + 6 + 6 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 64204226685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64204226687) 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, 713380252 + ... + 713380341.

It is an arithmetic number, because the mean of its divisors is an integer number (9273943861).

Almost surely, 2^64204226685 is an apocalyptic number.

It is an amenable number.

64204226685 is a deficient number, since it is larger than the sum of its proper divisors (47083099647).

64204226685 is a wasteful number, since it uses less digits than its factorization.

64204226685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1426760604 (or 1426760601 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 64204226685 in words is "sixty-four billion, two hundred four million, two hundred twenty-six thousand, six hundred eighty-five".