204111351506 has 8 divisors (see below), whose sum is σ = 306182328060. Its totient is φ = 102050575488.

The previous prime is 204111351497. The next prime is 204111351517. The reversal of 204111351506 is 605153111402.

It can be written as a sum of positive squares in 2 ways, for example, as 146539668025 + 57571683481 = 382805^2 + 239941^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×204111351506² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2499911 + ... + 2580266.

Almost surely, 2^204111351506 is an apocalyptic number.

204111351506 is a deficient number, since it is larger than the sum of its proper divisors (102070976554).

204111351506 is a wasteful number, since it uses less digits than its factorization.

204111351506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5100268.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 204111351506 its reverse (605153111402), we get a palindrome (809264462908).

The spelling of 204111351506 in words is "two hundred four billion, one hundred eleven million, three hundred fifty-one thousand, five hundred six".