205353443553 has 16 divisors (see below), whose sum is σ = 281768328000. Its totient is φ = 132935259456.

The previous prime is 205353443497. The next prime is 205353443557. The reversal of 205353443553 is 355344353502.

It is not a de Polignac number, because 205353443553 - 2¹² = 205353439457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (205353443557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1798350 + ... + 1909127.

It is an arithmetic number, because the mean of its divisors is an integer number (17610520500).

Almost surely, 2^205353443553 is an apocalyptic number.

It is an amenable number.

205353443553 is a deficient number, since it is larger than the sum of its proper divisors (76414884447).

205353443553 is a wasteful number, since it uses less digits than its factorization.

205353443553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708016.

The product of its (nonzero) digits is 1620000, while the sum is 42.

The spelling of 205353443553 in words is "two hundred five billion, three hundred fifty-three million, four hundred forty-three thousand, five hundred fifty-three".