9145447921679 has 2 divisors, whose sum is σ = 9145447921680. Its totient is φ = 9145447921678.

The previous prime is 9145447921657. The next prime is 9145447921691. The reversal of 9145447921679 is 9761297445419.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9145447921679 - 2¹⁶ = 9145447856143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9145447921879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4572723960839 + 4572723960840.

It is an arithmetic number, because the mean of its divisors is an integer number (4572723960840).

Almost surely, 2^{9145447921679} is an apocalyptic number.

9145447921679 is a deficient number, since it is larger than the sum of its proper divisors (1).

9145447921679 is an equidigital number, since it uses as much as digits as its factorization.

9145447921679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 137168640, while the sum is 68.

The spelling of 9145447921679 in words is "nine trillion, one hundred forty-five billion, four hundred forty-seven million, nine hundred twenty-one thousand, six hundred seventy-nine".