16775275561 has 12 divisors (see below), whose sum is σ = 19240635456. Its totient is φ = 14587193720.

The previous prime is 16775275553. The next prime is 16775275567. The reversal of 16775275561 is 16557257761.

It is not a de Polignac number, because 16775275561 - 2³ = 16775275553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16775275499 and 16775275508.

It is not an unprimeable number, because it can be changed into a prime (16775275567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3011101 + ... + 3016666.

It is an arithmetic number, because the mean of its divisors is an integer number (1603386288).

Almost surely, 2^16775275561 is an apocalyptic number.

16775275561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16775275561 is a deficient number, since it is larger than the sum of its proper divisors (2465359895).

16775275561 is a wasteful number, since it uses less digits than its factorization.

16775275561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6027812 (or 6027801 counting only the distinct ones).

The product of its digits is 3087000, while the sum is 52.

The spelling of 16775275561 in words is "sixteen billion, seven hundred seventy-five million, two hundred seventy-five thousand, five hundred sixty-one".