263215621408 has 12 divisors (see below), whose sum is σ = 518205754710. Its totient is φ = 131607810688.

The previous prime is 263215621391. The next prime is 263215621517. The reversal of 263215621408 is 804126512362.

263215621408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 260112240144 + 3103381264 = 510012^2 + 55708^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4112744053 + ... + 4112744116.

Almost surely, 2^263215621408 is an apocalyptic number.

It is an amenable number.

263215621408 is a deficient number, since it is larger than the sum of its proper divisors (254990133302).

263215621408 is an equidigital number, since it uses as much as digits as its factorization.

263215621408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8225488179 (or 8225488171 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 263215621408 in words is "two hundred sixty-three billion, two hundred fifteen million, six hundred twenty-one thousand, four hundred eight".