1721854648 has 8 divisors (see below), whose sum is σ = 3228477480. Its totient is φ = 860927320.

The previous prime is 1721854637. The next prime is 1721854649. The reversal of 1721854648 is 8464581271.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1721854598 and 1721854607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1721854649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107615908 + ... + 107615923.

It is an arithmetic number, because the mean of its divisors is an integer number (403559685).

Almost surely, 2^1721854648 is an apocalyptic number.

It is an amenable number.

1721854648 is a deficient number, since it is larger than the sum of its proper divisors (1506622832).

1721854648 is a wasteful number, since it uses less digits than its factorization.

1721854648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215231837 (or 215231833 counting only the distinct ones).

The product of its digits is 430080, while the sum is 46.

The square root of 1721854648 is about 41495.2364495010. The cubic root of 1721854648 is about 1198.5757751365.

The spelling of 1721854648 in words is "one billion, seven hundred twenty-one million, eight hundred fifty-four thousand, six hundred forty-eight".