16365494261 has 4 divisors (see below), whose sum is σ = 17328170412. Its totient is φ = 15402818112.

The previous prime is 16365494231. The next prime is 16365494287. The reversal of 16365494261 is 16249456361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13394590225 + 2970904036 = 115735^2 + 54506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16365494261 is a prime.

It is a super-2 number, since 2×16365494261² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16365494231) 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, 481338050 + ... + 481338083.

It is an arithmetic number, because the mean of its divisors is an integer number (4332042603).

Almost surely, 2^16365494261 is an apocalyptic number.

It is an amenable number.

16365494261 is a deficient number, since it is larger than the sum of its proper divisors (962676151).

16365494261 is an equidigital number, since it uses as much as digits as its factorization.

16365494261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962676150.

The product of its digits is 933120, while the sum is 47.

The spelling of 16365494261 in words is "sixteen billion, three hundred sixty-five million, four hundred ninety-four thousand, two hundred sixty-one".