204380787828464 has 80 divisors (see below), whose sum is σ = 432300796603200. Its totient is φ = 93035113187328.

The previous prime is 204380787828463. The next prime is 204380787828509. The reversal of 204380787828464 is 464828787083402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204380787828463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 717590117 + ... + 717874875.

It is an arithmetic number, because the mean of its divisors is an integer number (5403759957540).

Almost surely, 2^{204380787828464} is an apocalyptic number.

It is an amenable number.

204380787828464 is an abundant number, since it is smaller than the sum of its proper divisors (227920008774736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204380787828464 is a wasteful number, since it uses less digits than its factorization.

204380787828464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332122 (or 332116 counting only the distinct ones).

The product of its (nonzero) digits is 924844032, while the sum is 71.

The spelling of 204380787828464 in words is "two hundred four trillion, three hundred eighty billion, seven hundred eighty-seven million, eight hundred twenty-eight thousand, four hundred sixty-four".