205413634324145 has 32 divisors (see below), whose sum is σ = 269075162248704. Its totient is φ = 149633985312000.

The previous prime is 205413634324117. The next prime is 205413634324231. The reversal of 205413634324145 is 541423436314502.

It is not a de Polignac number, because 205413634324145 - 2²⁰ = 205413633275569 is a prime.

It is a super-2 number, since 2×205413634324145² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 205413634324145.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 55950047 + ... + 59508276.

It is an arithmetic number, because the mean of its divisors is an integer number (8408598820272).

Almost surely, 2^{205413634324145} is an apocalyptic number.

It is an amenable number.

205413634324145 is a deficient number, since it is larger than the sum of its proper divisors (63661527924559).

205413634324145 is a wasteful number, since it uses less digits than its factorization.

205413634324145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115458713.

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 205413634324145 in words is "two hundred five trillion, four hundred thirteen billion, six hundred thirty-four million, three hundred twenty-four thousand, one hundred forty-five".