263422990208 has 128 divisors (see below), whose sum is σ = 613796832000. Its totient is φ = 112563709440.

The previous prime is 263422990147. The next prime is 263422990217. The reversal of 263422990208 is 802099224362.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15226043 + ... + 15243333.

It is an arithmetic number, because the mean of its divisors is an integer number (4795287750).

Almost surely, 2^263422990208 is an apocalyptic number.

263422990208 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 263422990208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306898416000).

263422990208 is an abundant number, since it is smaller than the sum of its proper divisors (350373841792).

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

263422990208 is an equidigital number, since it uses as much as digits as its factorization.

263422990208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17673 (or 17647 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 263422990208 in words is "two hundred sixty-three billion, four hundred twenty-two million, nine hundred ninety thousand, two hundred eight".