204563260611523 has 4 divisors (see below), whose sum is σ = 223159920667128. Its totient is φ = 185966600555920.

The previous prime is 204563260611517. The next prime is 204563260611529. The reversal of 204563260611523 is 325116062365402.

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

It is an interprime number because it is at equal distance from previous prime (204563260611517) and next prime (204563260611529).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204563260611523 is a prime.

It is a super-2 number, since 2×204563260611523² (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 (204563260611529) 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, 9298330027786 + ... + 9298330027807.

It is an arithmetic number, because the mean of its divisors is an integer number (55789980166782).

Almost surely, 2^{204563260611523} is an apocalyptic number.

204563260611523 is a deficient number, since it is larger than the sum of its proper divisors (18596660055605).

204563260611523 is a wasteful number, since it uses less digits than its factorization.

204563260611523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18596660055604.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 204563260611523 in words is "two hundred four trillion, five hundred sixty-three billion, two hundred sixty million, six hundred eleven thousand, five hundred twenty-three".