204012551664506 has 8 divisors (see below), whose sum is σ = 329558737304244. Its totient is φ = 94159639229760.

The previous prime is 204012551664499. The next prime is 204012551664547. The reversal of 204012551664506 is 605466155210402.

It can be written as a sum of positive squares in 2 ways, for example, as 203265898408225 + 746653256281 = 14257135^2 + 864091^2 .

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

It is a super-2 number, since 2×204012551664506² (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 3 ways as a sum of consecutive naturals, for example, 3923318301215 + ... + 3923318301266.

Almost surely, 2^{204012551664506} is an apocalyptic number.

204012551664506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

204012551664506 is a deficient number, since it is larger than the sum of its proper divisors (125546185639738).

204012551664506 is a wasteful number, since it uses less digits than its factorization.

204012551664506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7846636602496.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 204012551664506 in words is "two hundred four trillion, twelve billion, five hundred fifty-one million, six hundred sixty-four thousand, five hundred six".