263604407816 has 16 divisors (see below), whose sum is σ = 503583893100. Its totient is φ = 129315369664.

The previous prime is 263604407813. The next prime is 263604407837. The reversal of 263604407816 is 618704406362.

It can be written as a sum of positive squares in 2 ways, for example, as 253457874916 + 10146532900 = 503446^2 + 100730^2 .

It is not an unprimeable number, because it can be changed into a prime (263604407813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 310853831 + ... + 310854678.

Almost surely, 2^263604407816 is an apocalyptic number.

It is an amenable number.

263604407816 is a deficient number, since it is larger than the sum of its proper divisors (239979485284).

263604407816 is a wasteful number, since it uses less digits than its factorization.

263604407816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621708568 (or 621708564 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 47.

The spelling of 263604407816 in words is "two hundred sixty-three billion, six hundred four million, four hundred seven thousand, eight hundred sixteen".