6990209145 has 32 divisors (see below), whose sum is σ = 12438316800. Its totient is φ = 3724728192.

The previous prime is 6990209113. The next prime is 6990209153. The reversal of 6990209145 is 5419020996.

It is not a de Polignac number, because 6990209145 - 2⁵ = 6990209113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 6990209145.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 129484 + ... + 175346.

It is an arithmetic number, because the mean of its divisors is an integer number (388697400).

Almost surely, 2^6990209145 is an apocalyptic number.

It is an amenable number.

6990209145 is a deficient number, since it is larger than the sum of its proper divisors (5448107655).

6990209145 is a wasteful number, since it uses less digits than its factorization.

6990209145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47006 (or 47000 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 6990209145 is about 83607.4706291250. The cubic root of 6990209145 is about 1912.0388984496.

The spelling of 6990209145 in words is "six billion, nine hundred ninety million, two hundred nine thousand, one hundred forty-five".