204323454411505 has 64 divisors (see below), whose sum is σ = 289779727668480. Its totient is φ = 137157747916800.

The previous prime is 204323454411487. The next prime is 204323454411509. The reversal of 204323454411505 is 505114454323402.

It is a happy number.

It is not a de Polignac number, because 204323454411505 - 2⁵ = 204323454411473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204323454411509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1793496945 + ... + 1793610865.

It is an arithmetic number, because the mean of its divisors is an integer number (4527808244820).

Almost surely, 2^{204323454411505} is an apocalyptic number.

It is an amenable number.

204323454411505 is a deficient number, since it is larger than the sum of its proper divisors (85456273256975).

204323454411505 is a wasteful number, since it uses less digits than its factorization.

204323454411505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128819 (or 128793 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 43.

The spelling of 204323454411505 in words is "two hundred four trillion, three hundred twenty-three billion, four hundred fifty-four million, four hundred eleven thousand, five hundred five".