8628657409 has 4 divisors (see below), whose sum is σ = 8861864404. Its totient is φ = 8395450416.

The previous prime is 8628657383. The next prime is 8628657431. The reversal of 8628657409 is 9047568268.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5059192384 + 3569465025 = 71128^2 + 59745^2 .

It is a cyclic number.

It is not a de Polignac number, because 8628657409 - 2¹⁹ = 8628133121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8628657409.

It is not an unprimeable number, because it can be changed into a prime (8628657439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116603442 + ... + 116603515.

It is an arithmetic number, because the mean of its divisors is an integer number (2215466101).

Almost surely, 2^8628657409 is an apocalyptic number.

It is an amenable number.

8628657409 is a deficient number, since it is larger than the sum of its proper divisors (233206995).

8628657409 is a wasteful number, since it uses less digits than its factorization.

8628657409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233206994.

The product of its (nonzero) digits is 5806080, while the sum is 55.

The square root of 8628657409 is about 92890.5668461551. The cubic root of 8628657409 is about 2051.0728002956.

The spelling of 8628657409 in words is "eight billion, six hundred twenty-eight million, six hundred fifty-seven thousand, four hundred nine".