263541728820 has 48 divisors (see below), whose sum is σ = 738074534400. Its totient is φ = 70262775936.

The previous prime is 263541728803. The next prime is 263541728861. The reversal of 263541728820 is 28827145362.

It is a self number, because there is not a number n which added to its sum of digits gives 263541728820.

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, 184795 + ... + 749154.

It is an arithmetic number, because the mean of its divisors is an integer number (15376552800).

Almost surely, 2^263541728820 is an apocalyptic number.

263541728820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

263541728820 is an abundant number, since it is smaller than the sum of its proper divisors (474532805580).

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

263541728820 is a wasteful number, since it uses less digits than its factorization.

263541728820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938664 (or 938662 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The spelling of 263541728820 in words is "two hundred sixty-three billion, five hundred forty-one million, seven hundred twenty-eight thousand, eight hundred twenty".