16545170422721 has 8 divisors (see below), whose sum is σ = 16637970271104. Its totient is φ = 16452385850160.

The previous prime is 16545170422631. The next prime is 16545170422723. The reversal of 16545170422721 is 12722407154561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16545170422721 - 2³⁴ = 16527990553537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16545170422723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1643225 + ... + 5982518.

It is an arithmetic number, because the mean of its divisors is an integer number (2079746283888).

Almost surely, 2^{16545170422721} is an apocalyptic number.

It is an amenable number.

16545170422721 is a deficient number, since it is larger than the sum of its proper divisors (92799848383).

16545170422721 is a wasteful number, since it uses less digits than its factorization.

16545170422721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7637911.

The product of its (nonzero) digits is 940800, while the sum is 47.

The spelling of 16545170422721 in words is "sixteen trillion, five hundred forty-five billion, one hundred seventy million, four hundred twenty-two thousand, seven hundred twenty-one".