1649394806 has 8 divisors (see below), whose sum is σ = 2540959680. Its totient is φ = 802408248.

The previous prime is 1649394787. The next prime is 1649394833. The reversal of 1649394806 is 6084939461.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11144486 + ... + 11144633.

It is an arithmetic number, because the mean of its divisors is an integer number (317619960).

Almost surely, 2^1649394806 is an apocalyptic number.

1649394806 is a deficient number, since it is larger than the sum of its proper divisors (891564874).

1649394806 is a wasteful number, since it uses less digits than its factorization.

1649394806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22289158.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 1649394806 is about 40612.7419167926. The cubic root of 1649394806 is about 1181.5212606748.

The spelling of 1649394806 in words is "one billion, six hundred forty-nine million, three hundred ninety-four thousand, eight hundred six".