204072428667 has 4 divisors (see below), whose sum is σ = 272096571560. Its totient is φ = 136048285776.

The previous prime is 204072428629. The next prime is 204072428713. The reversal of 204072428667 is 766824270402.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 204072428667 - 2¹⁵ = 204072395899 is a prime.

It is a super-2 number, since 2×204072428667² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204072428867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34012071442 + ... + 34012071447.

It is an arithmetic number, because the mean of its divisors is an integer number (68024142890).

Almost surely, 2^204072428667 is an apocalyptic number.

204072428667 is a deficient number, since it is larger than the sum of its proper divisors (68024142893).

204072428667 is an equidigital number, since it uses as much as digits as its factorization.

204072428667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68024142892.

The product of its (nonzero) digits is 1806336, while the sum is 48.

The spelling of 204072428667 in words is "two hundred four billion, seventy-two million, four hundred twenty-eight thousand, six hundred sixty-seven".