1648981226 has 4 divisors (see below), whose sum is σ = 2473471842. Its totient is φ = 824490612.

The previous prime is 1648981223. The next prime is 1648981241. The reversal of 1648981226 is 6221898461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6221898461 = 41 ⋅151753621.

It can be written as a sum of positive squares in only one way, i.e., 944025625 + 704955601 = 30725^2 + 26551^2 .

It is not an unprimeable number, because it can be changed into a prime (1648981223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412245305 + ... + 412245308.

Almost surely, 2^1648981226 is an apocalyptic number.

1648981226 is a deficient number, since it is larger than the sum of its proper divisors (824490616).

1648981226 is an equidigital number, since it uses as much as digits as its factorization.

1648981226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824490615.

The product of its digits is 331776, while the sum is 47.

The square root of 1648981226 is about 40607.6498458111. The cubic root of 1648981226 is about 1181.4224983066.

The spelling of 1648981226 in words is "one billion, six hundred forty-eight million, nine hundred eighty-one thousand, two hundred twenty-six".