204012551664497 has 4 divisors (see below), whose sum is σ = 204012703406400. Its totient is φ = 204012399922596.

The previous prime is 204012551664469. The next prime is 204012551664499. The reversal of 204012551664497 is 794466155210402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 204012551664497 - 2⁶ = 204012551664433 is a prime.

It is a super-2 number, since 2×204012551664497² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204012551664499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73836053 + ... + 76549250.

It is an arithmetic number, because the mean of its divisors is an integer number (51003175851600).

Almost surely, 2^{204012551664497} is an apocalyptic number.

It is an amenable number.

204012551664497 is a deficient number, since it is larger than the sum of its proper divisors (151741903).

204012551664497 is a wasteful number, since it uses less digits than its factorization.

204012551664497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151741902.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 204012551664497 in words is "two hundred four trillion, twelve billion, five hundred fifty-one million, six hundred sixty-four thousand, four hundred ninety-seven".