205053025545 has 24 divisors (see below), whose sum is σ = 355450789512. Its totient is φ = 109353753600.

The previous prime is 205053025523. The next prime is 205053025553. The reversal of 205053025545 is 545520350502.

205053025545 is a `hidden beast` number, since 2 + 0 + 50 + 53 + 0 + 2 + 554 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 68244770169 + 136808255376 = 261237^2 + 369876^2 .

It is not a de Polignac number, because 205053025545 - 2¹⁶ = 205052960009 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 498775 + ... + 811715.

It is an arithmetic number, because the mean of its divisors is an integer number (14810449563).

Almost surely, 2^205053025545 is an apocalyptic number.

It is an amenable number.

205053025545 is a deficient number, since it is larger than the sum of its proper divisors (150397763967).

205053025545 is a wasteful number, since it uses less digits than its factorization.

205053025545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327513 (or 327510 counting only the distinct ones).

The product of its (nonzero) digits is 150000, while the sum is 36.

The spelling of 205053025545 in words is "two hundred five billion, fifty-three million, twenty-five thousand, five hundred forty-five".