16550775871081 has 32 divisors (see below), whose sum is σ = 17932252262400. Its totient is φ = 15227868015360.

The previous prime is 16550775871031. The next prime is 16550775871129. The reversal of 16550775871081 is 18017857705561.

It is a cyclic number.

It is not a de Polignac number, because 16550775871081 - 2²⁷ = 16550641653353 is a prime.

It is a super-2 number, since 2×16550775871081² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16550775871031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45965910 + ... + 46324576.

It is an arithmetic number, because the mean of its divisors is an integer number (560382883200).

Almost surely, 2^{16550775871081} is an apocalyptic number.

It is an amenable number.

16550775871081 is a deficient number, since it is larger than the sum of its proper divisors (1381476391319).

16550775871081 is a wasteful number, since it uses less digits than its factorization.

16550775871081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359269.

The product of its (nonzero) digits is 16464000, while the sum is 61.

The spelling of 16550775871081 in words is "sixteen trillion, five hundred fifty billion, seven hundred seventy-five million, eight hundred seventy-one thousand, eighty-one".