1648744673 has 8 divisors (see below), whose sum is σ = 1720840896. Its totient is φ = 1576682800.

The previous prime is 1648744667. The next prime is 1648744687. The reversal of 1648744673 is 3764478461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1648744673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1648744663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160883 + ... + 170823.

It is an arithmetic number, because the mean of its divisors is an integer number (215105112).

Almost surely, 2^1648744673 is an apocalyptic number.

It is an amenable number.

1648744673 is a deficient number, since it is larger than the sum of its proper divisors (72096223).

1648744673 is an equidigital number, since it uses as much as digits as its factorization.

1648744673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17175.

The product of its digits is 2709504, while the sum is 50.

The square root of 1648744673 is about 40604.7370758635. The cubic root of 1648744673 is about 1181.3660023327.

The spelling of 1648744673 in words is "one billion, six hundred forty-eight million, seven hundred forty-four thousand, six hundred seventy-three".