16541516873721 has 32 divisors (see below), whose sum is σ = 25692498355968. Its totient is φ = 9270053694720.

The previous prime is 16541516873711. The next prime is 16541516873741. The reversal of 16541516873721 is 12737861514561.

It is not a de Polignac number, because 16541516873721 - 2¹⁸ = 16541516611577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16541516873711) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 470926 + ... + 5771031.

It is an arithmetic number, because the mean of its divisors is an integer number (802890573624).

Almost surely, 2^{16541516873721} is an apocalyptic number.

It is an amenable number.

16541516873721 is a deficient number, since it is larger than the sum of its proper divisors (9150981482247).

16541516873721 is a wasteful number, since it uses less digits than its factorization.

16541516873721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6244401.

The product of its digits is 8467200, while the sum is 57.

The spelling of 16541516873721 in words is "sixteen trillion, five hundred forty-one billion, five hundred sixteen million, eight hundred seventy-three thousand, seven hundred twenty-one".