16551000561010 has 32 divisors (see below), whose sum is σ = 29816078962032. Its totient is φ = 6615007338240.

The previous prime is 16551000560987. The next prime is 16551000561113. The reversal of 16551000561010 is 1016500015561.

It can be written as a sum of positive squares in 8 ways, for example, as 2352153001 + 16548648408009 = 48499^2 + 4068003^2 .

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, 60746244 + ... + 61018096.

Almost surely, 2^{16551000561010} is an apocalyptic number.

16551000561010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16551000561010 is a deficient number, since it is larger than the sum of its proper divisors (13265078401022).

16551000561010 is a wasteful number, since it uses less digits than its factorization.

16551000561010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276798.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 16551000561010 its reverse (1016500015561), we get a palindrome (17567500576571).

The spelling of 16551000561010 in words is "sixteen trillion, five hundred fifty-one billion, five hundred sixty-one thousand, ten".