16545730224257 has 4 divisors (see below), whose sum is σ = 17818478703060. Its totient is φ = 15272981745456.

The previous prime is 16545730224223. The next prime is 16545730224329. The reversal of 16545730224257 is 75242203754561.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 4761861544561 + 11783868679696 = 2182169^2 + 3432764^2 .

It is a cyclic number.

It is not a de Polignac number, because 16545730224257 - 2³⁰ = 16544656482433 is a prime.

It is a super-2 number, since 2×16545730224257² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16545730224199 and 16545730224208.

It is not an unprimeable number, because it can be changed into a prime (16545730214257) 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, 636374239382 + ... + 636374239407.

It is an arithmetic number, because the mean of its divisors is an integer number (4454619675765).

Almost surely, 2^{16545730224257} is an apocalyptic number.

It is an amenable number.

16545730224257 is a deficient number, since it is larger than the sum of its proper divisors (1272748478803).

16545730224257 is a wasteful number, since it uses less digits than its factorization.

16545730224257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272748478802.

The product of its (nonzero) digits is 14112000, while the sum is 53.

The spelling of 16545730224257 in words is "sixteen trillion, five hundred forty-five billion, seven hundred thirty million, two hundred twenty-four thousand, two hundred fifty-seven".