16049206861 has 4 divisors (see below), whose sum is σ = 16050989500. Its totient is φ = 16047424224.

The previous prime is 16049206853. The next prime is 16049206931. The reversal of 16049206861 is 16860294061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16860294061 = 13 ⋅1296945697.

It can be written as a sum of positive squares in 2 ways, for example, as 7512555625 + 8536651236 = 86675^2 + 92394^2 .

It is a cyclic number.

It is not a de Polignac number, because 16049206861 - 2³ = 16049206853 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 (16049206801) 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, 877746 + ... + 895843.

It is an arithmetic number, because the mean of its divisors is an integer number (4012747375).

Almost surely, 2^16049206861 is an apocalyptic number.

It is an amenable number.

16049206861 is a deficient number, since it is larger than the sum of its proper divisors (1782639).

16049206861 is an equidigital number, since it uses as much as digits as its factorization.

16049206861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782638.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 16049206861 in words is "sixteen billion, forty-nine million, two hundred six thousand, eight hundred sixty-one".