9145447919623 has 2 divisors, whose sum is σ = 9145447919624. Its totient is φ = 9145447919622.

The previous prime is 9145447919617. The next prime is 9145447919653. The reversal of 9145447919623 is 3269197445419.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9145447919623 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9145447919653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4572723959811 + 4572723959812.

It is an arithmetic number, because the mean of its divisors is an integer number (4572723959812).

Almost surely, 2^{9145447919623} is an apocalyptic number.

9145447919623 is a deficient number, since it is larger than the sum of its proper divisors (1).

9145447919623 is an equidigital number, since it uses as much as digits as its factorization.

9145447919623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58786560, while the sum is 64.

The spelling of 9145447919623 in words is "nine trillion, one hundred forty-five billion, four hundred forty-seven million, nine hundred nineteen thousand, six hundred twenty-three".