16155546149 has 4 divisors (see below), whose sum is σ = 16239253836. Its totient is φ = 16071838464.

The previous prime is 16155546139. The next prime is 16155546167. The reversal of 16155546149 is 94164555161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94164555161 = 19 ⋅4956029219.

It can be written as a sum of positive squares in 2 ways, for example, as 6735484900 + 9420061249 = 82070^2 + 97057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16155546149 is a prime.

It is a super-2 number, since 2×16155546149² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16155546139) 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, 41853554 + ... + 41853939.

It is an arithmetic number, because the mean of its divisors is an integer number (4059813459).

Almost surely, 2^16155546149 is an apocalyptic number.

It is an amenable number.

16155546149 is a deficient number, since it is larger than the sum of its proper divisors (83707687).

16155546149 is an equidigital number, since it uses as much as digits as its factorization.

16155546149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83707686.

The product of its digits is 648000, while the sum is 47.

The spelling of 16155546149 in words is "sixteen billion, one hundred fifty-five million, five hundred forty-six thousand, one hundred forty-nine".