205453415555 has 16 divisors (see below), whose sum is σ = 253248174624. Its totient is φ = 159894777600.

The previous prime is 205453415539. The next prime is 205453415569. The reversal of 205453415555 is 555514354502.

It is not a de Polignac number, because 205453415555 - 2⁴ = 205453415539 is a prime.

It is a super-2 number, since 2×205453415555² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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, 1107359 + ... + 1279511.

It is an arithmetic number, because the mean of its divisors is an integer number (15828010914).

Almost surely, 2^205453415555 is an apocalyptic number.

205453415555 is a deficient number, since it is larger than the sum of its proper divisors (47794759069).

205453415555 is a wasteful number, since it uses less digits than its factorization.

205453415555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178646.

The product of its (nonzero) digits is 1500000, while the sum is 44.

The spelling of 205453415555 in words is "two hundred five billion, four hundred fifty-three million, four hundred fifteen thousand, five hundred fifty-five".