9545755378921 has 16 divisors (see below), whose sum is σ = 9636191262720. Its totient is φ = 9455872999680.

The previous prime is 9545755378919. The next prime is 9545755378963. The reversal of 9545755378921 is 1298735575459.

It is a cyclic number.

It is not a de Polignac number, because 9545755378921 - 2¹ = 9545755378919 is a prime.

It is a super-2 number, since 2×9545755378921² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9545750378921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34290390 + ... + 34567648.

It is an arithmetic number, because the mean of its divisors is an integer number (602261953920).

Almost surely, 2^{9545755378921} is an apocalyptic number.

It is an amenable number.

9545755378921 is a deficient number, since it is larger than the sum of its proper divisors (90435883799).

9545755378921 is a wasteful number, since it uses less digits than its factorization.

9545755378921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278256.

The product of its digits is 476280000, while the sum is 70.

The spelling of 9545755378921 in words is "nine trillion, five hundred forty-five billion, seven hundred fifty-five million, three hundred seventy-eight thousand, nine hundred twenty-one".