201720748406880 has 96 divisors (see below), whose sum is σ = 635493567286368. Its totient is φ = 53786001920000.

The previous prime is 201720748406857. The next prime is 201720748406899. The reversal of 201720748406880 is 88604847027102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 201720748406880.

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, 20038371 + ... + 28372130.

It is an arithmetic number, because the mean of its divisors is an integer number (6619724659233).

Almost surely, 2^{201720748406880} is an apocalyptic number.

201720748406880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201720748406880 is an abundant number, since it is smaller than the sum of its proper divisors (433772818879488).

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

201720748406880 is a wasteful number, since it uses less digits than its factorization.

201720748406880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48419200 (or 48419192 counting only the distinct ones).

The product of its (nonzero) digits is 9633792, while the sum is 57.

The spelling of 201720748406880 in words is "two hundred one trillion, seven hundred twenty billion, seven hundred forty-eight million, four hundred six thousand, eight hundred eighty".