205555274015 has 16 divisors (see below), whose sum is σ = 303589328448. Its totient is φ = 130109711616.

The previous prime is 205555274009. The next prime is 205555274101. The reversal of 205555274015 is 510472555502.

It is a cyclic number.

It is not a de Polignac number, because 205555274015 - 2¹⁰ = 205555272991 is a prime.

It is a congruent 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, 225884462 + ... + 225885371.

It is an arithmetic number, because the mean of its divisors is an integer number (18974333028).

Almost surely, 2^205555274015 is an apocalyptic number.

205555274015 is a deficient number, since it is larger than the sum of its proper divisors (98034054433).

205555274015 is a wasteful number, since it uses less digits than its factorization.

205555274015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451769858.

The product of its (nonzero) digits is 350000, while the sum is 41.

The spelling of 205555274015 in words is "two hundred five billion, five hundred fifty-five million, two hundred seventy-four thousand, fifteen".