1649606458 has 8 divisors (see below), whose sum is σ = 2619963252. Its totient is φ = 776285376.

The previous prime is 1649606447. The next prime is 1649606459. The reversal of 1649606458 is 8546069461.

It can be written as a sum of positive squares in 2 ways, for example, as 1493281449 + 156325009 = 38643^2 + 12503^2 .

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 (1649606459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24258885 + ... + 24258952.

Almost surely, 2^1649606458 is an apocalyptic number.

1649606458 is a deficient number, since it is larger than the sum of its proper divisors (970356794).

1649606458 is a wasteful number, since it uses less digits than its factorization.

1649606458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48517856.

The product of its (nonzero) digits is 1244160, while the sum is 49.

The square root of 1649606458 is about 40615.3475671451. The cubic root of 1649606458 is about 1181.5717965120.

The spelling of 1649606458 in words is "one billion, six hundred forty-nine million, six hundred six thousand, four hundred fifty-eight".