16061720571 has 24 divisors (see below), whose sum is σ = 26071202976. Its totient is φ = 9454389120.

The previous prime is 16061720551. The next prime is 16061720579. The reversal of 16061720571 is 17502716061.

16061720571 is a `hidden beast` number, since 1 + 6 + 0 + 61 + 7 + 20 + 571 = 666.

It is not a de Polignac number, because 16061720571 - 2⁵ = 16061720539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16061720579) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2981650 + ... + 2987031.

It is an arithmetic number, because the mean of its divisors is an integer number (1086300124).

Almost surely, 2^16061720571 is an apocalyptic number.

16061720571 is a deficient number, since it is larger than the sum of its proper divisors (10009482405).

16061720571 is a wasteful number, since it uses less digits than its factorization.

16061720571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968723 (or 5968720 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 36.

The spelling of 16061720571 in words is "sixteen billion, sixty-one million, seven hundred twenty thousand, five hundred seventy-one".