1648772906 has 8 divisors (see below), whose sum is σ = 2697992064. Its totient is φ = 749442220.

The previous prime is 1648772903. The next prime is 1648772927. The reversal of 1648772906 is 6092778461.

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

It is not an unprimeable number, because it can be changed into a prime (1648772903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37472090 + ... + 37472133.

It is an arithmetic number, because the mean of its divisors is an integer number (337249008).

Almost surely, 2^1648772906 is an apocalyptic number.

1648772906 is a deficient number, since it is larger than the sum of its proper divisors (1049219158).

1648772906 is a wasteful number, since it uses less digits than its factorization.

1648772906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74944236.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The square root of 1648772906 is about 40605.0847308561. The cubic root of 1648772906 is about 1181.3727455066.

The spelling of 1648772906 in words is "one billion, six hundred forty-eight million, seven hundred seventy-two thousand, nine hundred six".