16042171511 has 4 divisors (see below), whose sum is σ = 16475743752. Its totient is φ = 15608599272.

The previous prime is 16042171501. The next prime is 16042171517. The reversal of 16042171511 is 11517124061.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16042171511 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 (16042171517) 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, 216786065 + ... + 216786138.

It is an arithmetic number, because the mean of its divisors is an integer number (4118935938).

Almost surely, 2^16042171511 is an apocalyptic number.

16042171511 is a deficient number, since it is larger than the sum of its proper divisors (433572241).

16042171511 is an equidigital number, since it uses as much as digits as its factorization.

16042171511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433572240.

The product of its (nonzero) digits is 1680, while the sum is 29.

Adding to 16042171511 its reverse (11517124061), we get a palindrome (27559295572).

The spelling of 16042171511 in words is "sixteen billion, forty-two million, one hundred seventy-one thousand, five hundred eleven".