204156367215 has 32 divisors (see below), whose sum is σ = 338251216896. Its totient is φ = 105038551680.

The previous prime is 204156367213. The next prime is 204156367243. The reversal of 204156367215 is 512763651402.

It is not a de Polignac number, because 204156367215 - 2¹ = 204156367213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204156367213) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 545097 + ... + 839906.

It is an arithmetic number, because the mean of its divisors is an integer number (10570350528).

Almost surely, 2^204156367215 is an apocalyptic number.

204156367215 is a deficient number, since it is larger than the sum of its proper divisors (134094849681).

204156367215 is a wasteful number, since it uses less digits than its factorization.

204156367215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385359.

The product of its (nonzero) digits is 302400, while the sum is 42.

The spelling of 204156367215 in words is "two hundred four billion, one hundred fifty-six million, three hundred sixty-seven thousand, two hundred fifteen".