9817420680550 has 96 divisors (see below), whose sum is σ = 22610496978432. Its totient is φ = 3094300500480.

The previous prime is 9817420680541. The next prime is 9817420680559. The reversal of 9817420680550 is 550860247189.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (9817420680541) and next prime (9817420680559).

It is a junction number, because it is equal to n+sod(n) for n = 9817420680491 and 9817420680500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9817420680559) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 18930042 + ... + 19441741.

It is an arithmetic number, because the mean of its divisors is an integer number (235526010192).

Almost surely, 2^{9817420680550} is an apocalyptic number.

9817420680550 is an abundant number, since it is smaller than the sum of its proper divisors (12793076297882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9817420680550 is a wasteful number, since it uses less digits than its factorization.

9817420680550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38371862 (or 38371857 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 55.

The spelling of 9817420680550 in words is "nine trillion, eight hundred seventeen billion, four hundred twenty million, six hundred eighty thousand, five hundred fifty".