16650569842 has 4 divisors (see below), whose sum is σ = 24975854766. Its totient is φ = 8325284920.

The previous prime is 16650569813. The next prime is 16650569843. The reversal of 16650569842 is 24896505661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15192781081 + 1457788761 = 123259^2 + 38181^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16650569842.

It is not an unprimeable number, because it can be changed into a prime (16650569843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4162642459 + ... + 4162642462.

Almost surely, 2^16650569842 is an apocalyptic number.

16650569842 is a deficient number, since it is larger than the sum of its proper divisors (8325284924).

16650569842 is an equidigital number, since it uses as much as digits as its factorization.

16650569842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8325284923.

The product of its (nonzero) digits is 3110400, while the sum is 52.

The spelling of 16650569842 in words is "sixteen billion, six hundred fifty million, five hundred sixty-nine thousand, eight hundred forty-two".