6909721207145 has 8 divisors (see below), whose sum is σ = 8297427559680. Its totient is φ = 5523935558320.

The previous prime is 6909721207133. The next prime is 6909721207183. The reversal of 6909721207145 is 5417021279096.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6909721207145 - 2²⁰ = 6909720158569 is a prime.

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, 480168011 + ... + 480182400.

It is an arithmetic number, because the mean of its divisors is an integer number (1037178444960).

Almost surely, 2^{6909721207145} is an apocalyptic number.

It is an amenable number.

6909721207145 is a deficient number, since it is larger than the sum of its proper divisors (1387706352535).

6909721207145 is a wasteful number, since it uses less digits than its factorization.

6909721207145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 960351855.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 6909721207145 in words is "six trillion, nine hundred nine billion, seven hundred twenty-one million, two hundred seven thousand, one hundred forty-five".