205004214252545 has 16 divisors (see below), whose sum is σ = 246268711687680. Its totient is φ = 163827624277824.

The previous prime is 205004214252451. The next prime is 205004214252587. The reversal of 205004214252545 is 545252412400502.

It is a cyclic number.

It is not a de Polignac number, because 205004214252545 - 2²⁸ = 205003945817089 is a prime.

It is a super-2 number, since 2×205004214252545² (a number of 29 digits) contains 22 as substring.

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, 71570804 + ... + 74380026.

It is an arithmetic number, because the mean of its divisors is an integer number (15391794480480).

Almost surely, 2^{205004214252545} is an apocalyptic number.

It is an amenable number.

205004214252545 is a deficient number, since it is larger than the sum of its proper divisors (41264497435135).

205004214252545 is a wasteful number, since it uses less digits than its factorization.

205004214252545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2824864.

The product of its (nonzero) digits is 640000, while the sum is 41.

The spelling of 205004214252545 in words is "two hundred five trillion, four billion, two hundred fourteen million, two hundred fifty-two thousand, five hundred forty-five".