7804468639 has 4 divisors (see below), whose sum is σ = 8513965800. Its totient is φ = 7094971480.

The previous prime is 7804468631. The next prime is 7804468699. The reversal of 7804468639 is 9368644087.

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

It is a cyclic number.

It is not a de Polignac number, because 7804468639 - 2³ = 7804468631 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 7804468639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7804468631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 354748564 + ... + 354748585.

It is an arithmetic number, because the mean of its divisors is an integer number (2128491450).

Almost surely, 2^7804468639 is an apocalyptic number.

7804468639 is a deficient number, since it is larger than the sum of its proper divisors (709497161).

7804468639 is a wasteful number, since it uses less digits than its factorization.

7804468639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709497160.

The product of its (nonzero) digits is 6967296, while the sum is 55.

The square root of 7804468639 is about 88342.9037274642. The cubic root of 7804468639 is about 1983.5711356476.

The spelling of 7804468639 in words is "seven billion, eight hundred four million, four hundred sixty-eight thousand, six hundred thirty-nine".