1649518906 has 8 divisors (see below), whose sum is σ = 2827746720. Its totient is φ = 706936668.

The previous prime is 1649518901. The next prime is 1649518907. The reversal of 1649518906 is 6098159461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1649518906.

It is not an unprimeable number, because it can be changed into a prime (1649518901) 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, 58911376 + ... + 58911403.

It is an arithmetic number, because the mean of its divisors is an integer number (353468340).

Almost surely, 2^1649518906 is an apocalyptic number.

1649518906 is a deficient number, since it is larger than the sum of its proper divisors (1178227814).

1649518906 is a wasteful number, since it uses less digits than its factorization.

1649518906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117822788.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 1649518906 is about 40614.2697336786. The cubic root of 1649518906 is about 1181.5508923738.

The spelling of 1649518906 in words is "one billion, six hundred forty-nine million, five hundred eighteen thousand, nine hundred six".