16551100505 has 8 divisors (see below), whose sum is σ = 19868489352. Its totient is φ = 13236101248.

The previous prime is 16551100471. The next prime is 16551100513. The reversal of 16551100505 is 50500115561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2111953936 + 14439146569 = 45956^2 + 120163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16551100505 - 2³⁰ = 15477358681 is a prime.

It is a super-2 number, since 2×16551100505² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 582122 + ... + 609891.

It is an arithmetic number, because the mean of its divisors is an integer number (2483561169).

Almost surely, 2^16551100505 is an apocalyptic number.

It is an amenable number.

16551100505 is a deficient number, since it is larger than the sum of its proper divisors (3317388847).

16551100505 is a wasteful number, since it uses less digits than its factorization.

16551100505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194795.

The product of its (nonzero) digits is 3750, while the sum is 29.

The spelling of 16551100505 in words is "sixteen billion, five hundred fifty-one million, one hundred thousand, five hundred five".