263243781773980 has 144 divisors (see below), whose sum is σ = 671855883531840. Its totient is φ = 86224160934912.

The previous prime is 263243781773977. The next prime is 263243781774013. The reversal of 263243781773980 is 89377187342362.

It is a Harshad number since it is a multiple of its sum of digits (70).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11016714 + ... + 25453006.

It is an arithmetic number, because the mean of its divisors is an integer number (4665665857860).

Almost surely, 2^{263243781773980} is an apocalyptic number.

263243781773980 is a gapful number since it is divisible by the number (20) 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 263243781773980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335927941765920).

263243781773980 is an abundant number, since it is smaller than the sum of its proper divisors (408612101757860).

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

263243781773980 is a wasteful number, since it uses less digits than its factorization.

263243781773980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14437148 (or 14437139 counting only the distinct ones).

The product of its (nonzero) digits is 512096256, while the sum is 70.

The spelling of 263243781773980 in words is "two hundred sixty-three trillion, two hundred forty-three billion, seven hundred eighty-one million, seven hundred seventy-three thousand, nine hundred eighty".