1650663394 has 16 divisors (see below), whose sum is σ = 2499856128. Its totient is φ = 817416432.

The previous prime is 1650663353. The next prime is 1650663397. The reversal of 1650663394 is 4933660561.

It is a self number, because there is not a number n which added to its sum of digits gives 1650663394.

It is not an unprimeable number, because it can be changed into a prime (1650663397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78469 + ... + 97255.

It is an arithmetic number, because the mean of its divisors is an integer number (156241008).

Almost surely, 2^1650663394 is an apocalyptic number.

1650663394 is a deficient number, since it is larger than the sum of its proper divisors (849192734).

1650663394 is a wasteful number, since it uses less digits than its factorization.

1650663394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19209.

The product of its (nonzero) digits is 349920, while the sum is 43.

The square root of 1650663394 is about 40628.3570182207. The cubic root of 1650663394 is about 1181.8240948985.

The spelling of 1650663394 in words is "one billion, six hundred fifty million, six hundred sixty-three thousand, three hundred ninety-four".