649149814 has 4 divisors (see below), whose sum is σ = 973724724. Its totient is φ = 324574906.

The previous prime is 649149779. The next prime is 649149817. The reversal of 649149814 is 418941946.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649149817) 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 as a sum of consecutive naturals, namely, 162287452 + ... + 162287455.

It is an arithmetic number, because the mean of its divisors is an integer number (243431181).

Almost surely, 2^649149814 is an apocalyptic number.

649149814 is a deficient number, since it is larger than the sum of its proper divisors (324574910).

649149814 is a wasteful number, since it uses less digits than its factorization.

649149814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324574909.

The product of its digits is 248832, while the sum is 46.

The square root of 649149814 is about 25478.4185929975. The cubic root of 649149814 is about 865.8612665272.

The spelling of 649149814 in words is "six hundred forty-nine million, one hundred forty-nine thousand, eight hundred fourteen".