1648243447 has 6 divisors (see below), whose sum is σ = 1650895008. Its totient is φ = 1645595784.

The previous prime is 1648243427. The next prime is 1648243451. The reversal of 1648243447 is 7443428461.

It is a de Polignac number, because none of the positive numbers 2^k-1648243447 is a prime.

It is a super-3 number, since 3×1648243447³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648243427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 768058 + ... + 770200.

It is an arithmetic number, because the mean of its divisors is an integer number (275149168).

Almost surely, 2^1648243447 is an apocalyptic number.

1648243447 is a deficient number, since it is larger than the sum of its proper divisors (2651561).

1648243447 is an frugal number, since it uses more digits than its factorization.

1648243447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3897 (or 3020 counting only the distinct ones).

The product of its digits is 516096, while the sum is 43.

The square root of 1648243447 is about 40598.5645928523. The cubic root of 1648243447 is about 1181.2462766248.

The spelling of 1648243447 in words is "one billion, six hundred forty-eight million, two hundred forty-three thousand, four hundred forty-seven".