309808447961 has 8 divisors (see below), whose sum is σ = 317472100704. Its totient is φ = 302165650080.

The previous prime is 309808447943. The next prime is 309808448003. The reversal of 309808447961 is 169744808903.

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

It is a cyclic number.

It is not a de Polignac number, because 309808447961 - 2¹⁴ = 309808431577 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 309808447961.

It is not an unprimeable number, because it can be changed into a prime (309808447561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5183636 + ... + 5243061.

It is an arithmetic number, because the mean of its divisors is an integer number (39684012588).

Almost surely, 2^309808447961 is an apocalyptic number.

It is an amenable number.

309808447961 is a deficient number, since it is larger than the sum of its proper divisors (7663652743).

309808447961 is a wasteful number, since it uses less digits than its factorization.

309808447961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10427431.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 309808447961 in words is "three hundred nine billion, eight hundred eight million, four hundred forty-seven thousand, nine hundred sixty-one".