205231544545 has 16 divisors (see below), whose sum is σ = 250736653440. Its totient is φ = 161219027200.

The previous prime is 205231544437. The next prime is 205231544657. The reversal of 205231544545 is 545445132502.

It is not a de Polignac number, because 205231544545 - 2⁹ = 205231544033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 205231544498 and 205231544507.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134941 + ... + 654730.

It is an arithmetic number, because the mean of its divisors is an integer number (15671040840).

Almost surely, 2^205231544545 is an apocalyptic number.

It is an amenable number.

205231544545 is a deficient number, since it is larger than the sum of its proper divisors (45505108895).

205231544545 is an equidigital number, since it uses as much as digits as its factorization.

205231544545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790616.

The product of its (nonzero) digits is 480000, while the sum is 40.

The spelling of 205231544545 in words is "two hundred five billion, two hundred thirty-one million, five hundred forty-four thousand, five hundred forty-five".