16575649945 has 16 divisors (see below), whose sum is σ = 20384557200. Its totient is φ = 12931609600.

The previous prime is 16575649939. The next prime is 16575650009. The reversal of 16575649945 is 54994657561.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2616936336 + 13958713609 = 51156^2 + 118147^2 .

It is not a de Polignac number, because 16575649945 - 2¹¹ = 16575647897 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506685 + ... + 538405.

It is an arithmetic number, because the mean of its divisors is an integer number (1274034825).

Almost surely, 2^16575649945 is an apocalyptic number.

It is an amenable number.

16575649945 is a deficient number, since it is larger than the sum of its proper divisors (3808907255).

16575649945 is a wasteful number, since it uses less digits than its factorization.

16575649945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34316.

The product of its digits is 40824000, while the sum is 61.

The spelling of 16575649945 in words is "sixteen billion, five hundred seventy-five million, six hundred forty-nine thousand, nine hundred forty-five".