9145447921678 has 16 divisors (see below), whose sum is σ = 13874320096560. Its totient is φ = 4520858152896.

The previous prime is 9145447921657. The next prime is 9145447921679. The reversal of 9145447921678 is 8761297445419.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9145447921679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45799276 + ... + 45998527.

It is an arithmetic number, because the mean of its divisors is an integer number (867145006035).

Almost surely, 2^{9145447921678} is an apocalyptic number.

9145447921678 is a deficient number, since it is larger than the sum of its proper divisors (4728872174882).

9145447921678 is a wasteful number, since it uses less digits than its factorization.

9145447921678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91798371.

The product of its digits is 121927680, while the sum is 67.

The spelling of 9145447921678 in words is "nine trillion, one hundred forty-five billion, four hundred forty-seven million, nine hundred twenty-one thousand, six hundred seventy-eight".