648149335 has 4 divisors (see below), whose sum is σ = 777779208. Its totient is φ = 518519464.

The previous prime is 648149321. The next prime is 648149351. The reversal of 648149335 is 533941846.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 533941846 = 2 ⋅266970923.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-648149335 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 648149291 and 648149300.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 64814929 + ... + 64814938.

It is an arithmetic number, because the mean of its divisors is an integer number (194444802).

Almost surely, 2^648149335 is an apocalyptic number.

648149335 is a deficient number, since it is larger than the sum of its proper divisors (129629873).

648149335 is a wasteful number, since it uses less digits than its factorization.

648149335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129629872.

The product of its digits is 311040, while the sum is 43.

The square root of 648149335 is about 25458.7771701627. Note that the first 3 decimals coincide. The cubic root of 648149335 is about 865.4162118748.

The spelling of 648149335 in words is "six hundred forty-eight million, one hundred forty-nine thousand, three hundred thirty-five".