16521602050 has 12 divisors (see below), whose sum is σ = 30730179906. Its totient is φ = 6608640800.

The previous prime is 16521602047. The next prime is 16521602051. The reversal of 16521602050 is 5020612561.

It can be written as a sum of positive squares in 3 ways, for example, as 14840356041 + 1681246009 = 121821^2 + 41003^2 .

It is not an unprimeable number, because it can be changed into a prime (16521602051) 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, 165215971 + ... + 165216070.

Almost surely, 2^16521602050 is an apocalyptic number.

16521602050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16521602050 is a deficient number, since it is larger than the sum of its proper divisors (14208577856).

16521602050 is a wasteful number, since it uses less digits than its factorization.

16521602050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330432053 (or 330432048 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The spelling of 16521602050 in words is "sixteen billion, five hundred twenty-one million, six hundred two thousand, fifty".