16063538591 has 4 divisors (see below), whose sum is σ = 16077351912. Its totient is φ = 16049725272.

The previous prime is 16063538573. The next prime is 16063538593. The reversal of 16063538591 is 19583536061.

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

It is a cyclic number.

It is not a de Polignac number, because 16063538591 - 2¹⁸ = 16063276447 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 (16063538593) 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, 6904916 + ... + 6907241.

It is an arithmetic number, because the mean of its divisors is an integer number (4019337978).

Almost surely, 2^16063538591 is an apocalyptic number.

16063538591 is a deficient number, since it is larger than the sum of its proper divisors (13813321).

16063538591 is a wasteful number, since it uses less digits than its factorization.

16063538591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13813320.

The product of its (nonzero) digits is 583200, while the sum is 47.

The spelling of 16063538591 in words is "sixteen billion, sixty-three million, five hundred thirty-eight thousand, five hundred ninety-one".