16061156491 has 4 divisors (see below), whose sum is σ = 16061776192. Its totient is φ = 16060536792.

The previous prime is 16061156413. The next prime is 16061156497. The reversal of 16061156491 is 19465116061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19465116061 = 359 ⋅54220379.

It is a cyclic number.

It is not a de Polignac number, because 16061156491 - 2¹¹ = 16061154443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16061156497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 269196 + ... + 323401.

It is an arithmetic number, because the mean of its divisors is an integer number (4015444048).

Almost surely, 2^16061156491 is an apocalyptic number.

16061156491 is a deficient number, since it is larger than the sum of its proper divisors (619701).

16061156491 is an equidigital number, since it uses as much as digits as its factorization.

16061156491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619700.

The product of its (nonzero) digits is 38880, while the sum is 40.

The spelling of 16061156491 in words is "sixteen billion, sixty-one million, one hundred fifty-six thousand, four hundred ninety-one".