9712218018461 has 20 divisors (see below), whose sum is σ = 11571316059072. Its totient is φ = 8147635689816.

The previous prime is 9712218018431. The next prime is 9712218018463. The reversal of 9712218018461 is 1648108122179.

It is not a de Polignac number, because 9712218018461 - 2⁶ = 9712218018397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9712218018463) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42919835 + ... + 43145528.

Almost surely, 2^{9712218018461} is an apocalyptic number.

It is an amenable number.

9712218018461 is a deficient number, since it is larger than the sum of its proper divisors (1859098040611).

9712218018461 is an frugal number, since it uses more digits than its factorization.

9712218018461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86065438 (or 86065417 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 50.

The spelling of 9712218018461 in words is "nine trillion, seven hundred twelve billion, two hundred eighteen million, eighteen thousand, four hundred sixty-one".