1606397453923 has 6 divisors (see below), whose sum is σ = 1695394543164. Its totient is φ = 1521850219164.

The previous prime is 1606397453897. The next prime is 1606397453939. The reversal of 1606397453923 is 3293547936061.

It is a happy number.

It is not a de Polignac number, because 1606397453923 - 2⁹ = 1606397453411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1606397453723) 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 5 ways as a sum of consecutive naturals, for example, 2224926861 + ... + 2224927582.

It is an arithmetic number, because the mean of its divisors is an integer number (282565757194).

Almost surely, 2^{1606397453923} is an apocalyptic number.

1606397453923 is a deficient number, since it is larger than the sum of its proper divisors (88997089241).

1606397453923 is an equidigital number, since it uses as much as digits as its factorization.

1606397453923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449854481 (or 4449854462 counting only the distinct ones).

The product of its (nonzero) digits is 22044960, while the sum is 58.

The spelling of 1606397453923 in words is "one trillion, six hundred six billion, three hundred ninety-seven million, four hundred fifty-three thousand, nine hundred twenty-three".