1649398833 has 6 divisors (see below), whose sum is σ = 2382464994. Its totient is φ = 1099599216.

The previous prime is 1649398823. The next prime is 1649398853. The reversal of 1649398833 is 3388939461.

It can be written as a sum of positive squares in only one way, i.e., 1020994209 + 628404624 = 31953^2 + 25068^2 .

It is not a de Polignac number, because 1649398833 - 2⁵ = 1649398801 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1649398833.

It is not an unprimeable number, because it can be changed into a prime (1649398823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 91633260 + ... + 91633277.

It is an arithmetic number, because the mean of its divisors is an integer number (397077499).

Almost surely, 2^1649398833 is an apocalyptic number.

It is an amenable number.

1649398833 is a deficient number, since it is larger than the sum of its proper divisors (733066161).

1649398833 is a wasteful number, since it uses less digits than its factorization.

1649398833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183266543 (or 183266540 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 1649398833 is about 40612.7914947988. The cubic root of 1649398833 is about 1181.5222222361.

The spelling of 1649398833 in words is "one billion, six hundred forty-nine million, three hundred ninety-eight thousand, eight hundred thirty-three".