1649726458 has 8 divisors (see below), whose sum is σ = 2484858420. Its totient is φ = 821440320.

The previous prime is 1649726447. The next prime is 1649726459. The reversal of 1649726458 is 8546279461.

It can be written as a sum of positive squares in 2 ways, for example, as 1245595849 + 404130609 = 35293^2 + 20103^2 .

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 (1649726459) 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 3 ways as a sum of consecutive naturals, for example, 1710853 + ... + 1711816.

Almost surely, 2^1649726458 is an apocalyptic number.

1649726458 is a deficient number, since it is larger than the sum of its proper divisors (835131962).

1649726458 is a wasteful number, since it uses less digits than its factorization.

1649726458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3422912.

The product of its digits is 2903040, while the sum is 52.

The square root of 1649726458 is about 40616.8248143549. The cubic root of 1649726458 is about 1181.6004468156.

The spelling of 1649726458 in words is "one billion, six hundred forty-nine million, seven hundred twenty-six thousand, four hundred fifty-eight".