1648120813 has 8 divisors (see below), whose sum is σ = 1687504896. Its totient is φ = 1608784800.

The previous prime is 1648120801. The next prime is 1648120849. The reversal of 1648120813 is 3180218461.

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

It is not a de Polignac number, because 1648120813 - 2²¹ = 1646023661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1648120853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62868 + ... + 85138.

It is an arithmetic number, because the mean of its divisors is an integer number (210938112).

Almost surely, 2^1648120813 is an apocalyptic number.

It is an amenable number.

1648120813 is a deficient number, since it is larger than the sum of its proper divisors (39384083).

1648120813 is a wasteful number, since it uses less digits than its factorization.

1648120813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24035.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 1648120813 is about 40597.0542404249. The cubic root of 1648120813 is about 1181.2169798707.

The spelling of 1648120813 in words is "one billion, six hundred forty-eight million, one hundred twenty thousand, eight hundred thirteen".