216473601745 has 32 divisors (see below), whose sum is σ = 274073738400. Its totient is φ = 163920936960.

The previous prime is 216473601739. The next prime is 216473601749. The reversal of 216473601745 is 547106374612.

It can be written as a sum of positive squares in 16 ways, for example, as 52188488704 + 164285113041 = 228448^2 + 405321^2 .

It is not a de Polignac number, because 216473601745 - 2³ = 216473601737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216473601695 and 216473601704.

It is not an unprimeable number, because it can be changed into a prime (216473601749) 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, 2637081 + ... + 2717929.

It is an arithmetic number, because the mean of its divisors is an integer number (8564804325).

Almost surely, 2^216473601745 is an apocalyptic number.

It is an amenable number.

216473601745 is a deficient number, since it is larger than the sum of its proper divisors (57600136655).

216473601745 is a wasteful number, since it uses less digits than its factorization.

216473601745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81285.

The product of its (nonzero) digits is 846720, while the sum is 46.

The spelling of 216473601745 in words is "two hundred sixteen billion, four hundred seventy-three million, six hundred one thousand, seven hundred forty-five".