201623280500 has 108 divisors (see below), whose sum is σ = 451791413892. Its totient is φ = 78605066400.

The previous prime is 201623280499. The next prime is 201623280517. The reversal of 201623280500 is 5082326102.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 6451944976 + 195171335524 = 80324^2 + 441782^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 431741267 + ... + 431741733.

Almost surely, 2^201623280500 is an apocalyptic number.

201623280500 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 201623280500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225895706946).

201623280500 is an abundant number, since it is smaller than the sum of its proper divisors (250168133392).

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

201623280500 is an frugal number, since it uses more digits than its factorization.

201623280500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The spelling of 201623280500 in words is "two hundred one billion, six hundred twenty-three million, two hundred eighty thousand, five hundred".