16018281061 has 4 divisors (see below), whose sum is σ = 16018539532. Its totient is φ = 16018022592.

The previous prime is 16018281049. The next prime is 16018281067.

It is a happy number.

16018281061 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10648176100 + 5370104961 = 103190^2 + 73281^2 .

It is a cyclic number.

It is not a de Polignac number, because 16018281061 - 2¹³ = 16018272869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16018281067) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25405 + ... + 180781.

It is an arithmetic number, because the mean of its divisors is an integer number (4004634883).

Almost surely, 2^16018281061 is an apocalyptic number.

It is an amenable number.

16018281061 is a deficient number, since it is larger than the sum of its proper divisors (258471).

16018281061 is a wasteful number, since it uses less digits than its factorization.

16018281061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258470.

The product of its (nonzero) digits is 4608, while the sum is 34.

The spelling of 16018281061 in words is "sixteen billion, eighteen million, two hundred eighty-one thousand, sixty-one".