7809449002 has 16 divisors (see below), whose sum is σ = 11851547400. Its totient is φ = 3858976000.

The previous prime is 7809448991. The next prime is 7809449017. The reversal of 7809449002 is 2009449087.

7809449002 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5557851601 + 2251597401 = 74551^2 + 47451^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7809449002.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401502 + ... + 420502.

Almost surely, 2^7809449002 is an apocalyptic number.

7809449002 is a deficient number, since it is larger than the sum of its proper divisors (4042098398).

7809449002 is a wasteful number, since it uses less digits than its factorization.

7809449002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21401.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 7809449002 is about 88371.0869119533. The cubic root of 7809449002 is about 1983.9929795984.

The spelling of 7809449002 in words is "seven billion, eight hundred nine million, four hundred forty-nine thousand, two".